Z. Fisk

Critical Phenomena and the Quantum Critical Point of Ferromagnetic Zr1-xNbxZn2

D. A. Sokolov, M. C. Aronson, W. Gannon +1

We present a study of the magnetic properties of Zr1-xNbxZn2, using an Arrott plot analysis of the magnetization. The Curie temperature TC is suppressed to zero temperature for Nb…

cond-mat.supr-con2005

Unpaired Electrons in the Heavy-Fermion Superconductor CeCoIn_{5}

M. A. Tanatar, Johnpierre Paglione, S. Nakatsuji +9

Thermal conductivity and specific heat were measured in the superconducting state of the heavy fermion material Ce_{1-x}La_{x}CoIn_{5}. With increasing impurity concentration x, th…

cond-mat.str-el1999

Observation of a new excitation in the mixed-valent state of YbInCu_4

S. R. Garner, Y. W. Rodriguez, Z. Schlesinger +3

Infrared measurements are used to obtain conductivity as a function of temperature and frequency in YbInCu_4, which exhibits an isostructural transition to a mixed-valent state at…

cond-mat.supr-con2015

Tuning electronic correlations in transition metal pnictides: chemistry beyond the valence count

E. Razzoli, C. E. Matt, M. Kobayashi +14

The effects of electron-electron correlations on the low-energy electronic structure and their relationship with unconventional superconductivity are central aspects in the researc…

Hybridization gap and Fano resonance in SmB $_{6}$

S. RÃ¶Ãler, Tae-Hwan Jang, D. J. Kim +4

We present results of Scanning Tunneling Microscopy and Spectroscopy (STS) measurements on the "Kondo insulator" SmB $_{6}$ . The vast majority of surface areas investigated was recons…

cond-mat.mes-hall2014

Metallic Surface States Probed Within the Microwave Skin Depth of the Putative Topological Insulator YBiPt Compound

G. G. Lesseux, T. M. Garitezi, P. F. S. Rosa +7

Electron Spin Resonance (ESR) experiments of diluted Nd $^{3 +}$ ions in the claimed topological insulator (TI) YBiPt are reported. Powdered samples with grain size from $\approx$ 10…

cond-mat.str-el2022

Slow crystalline electric field fluctuations in the Kondo lattice SmB $_{6}$

M. Carlone, J. C. Souza, J. Sichelschmidt +7

This work reports on the temperature dependence of the electron spin resonance (ESR) of Gd $^{3 +}$ -doped SmB $_{6}$ single crystals at X- and Q-band microwave frequencies in differen…

cond-mat.supr-con2017

The role of magnetic excitations in magnetoresistance and Hall effect of slightly TM-substituted BaFe $_{2}$ As $_{2}$ compounds (TM = Mn, Cu, Ni)

J. P. PeÃ±a, M. M. Piva, C. B. R. Jesus +10

We report on electrical resistivity, magnetoresistance (MR) and Hall effect measurements in four non-superconducting BaFe $_{2 - x}$ TM $_{x}$ As $_{2}$ (TM = Mn, Cu and Ni) single crystals w…

Probing the localized to itinerant behavior of the 4f electron in CeIn3-xSnx by Gd3+ electron spin resonance

E. M. Bittar, C. Adriano, C. Giles +3

The CeIn3-xSnx cubic heavy fermion system presents an antiferromagnetic transition at T_N = 10 K, for x = 0, that decreases continuously down to 0 K upon Sn substitution at a criti…

cond-mat.mtrl-sci2020

Comparative Scanning Tunneling Microscopy Study on Hexaborides

S. Wirth, Sahana RÃ¶Ãler, Lin Jiao +3

We compare STM investigations on two hexaboride compounds, SmB $_{6}$ and EuB $_{6}$ , in an effort to provide a comprehensive picture of their surface structural properties. The latter i…

Evolution of magnetic polarons and spin-carrier interactions through the metal-insulator transition in Eu $_{1 - x}$ Gd $_{x}$ O

H. Rho, C. S. Snow, S. L. Cooper +3

Raman scattering studies as functions of temperature, magnetic field, and Gd-substitution are used to investigate the evolution of magnetic polarons and spin-carrier interactions t…

Weak Antilocalization and Linear Magnetoresistance in The Surface State of SmB6

S. Thomas, D. J. Kim, S. B. Chung +3

Strongly correlated Kondo insulator SmB6 is known for its peculiar low temperature residual conduction, which has recently been demonstrated to arise from a robust metallic surface…

cond-mat.supr-con1996

A Comparison of the High-Frequency Magnetic Fluctuations in Insulating and Superconducting La2-xSrxCuO4

S. M. Hayden, G. Aeppli, H. A. Mook +4

Inelastic neutron scattering performed at a spallation source is used to make absolute measurements of the dynamic susceptibility of insulating La2CuO4 and superconducting La2-xSrx…

cond-mat.mtrl-sci2004

Percolation and Colossal Magnetoresistance in Eu-based Hexaborides

G. A. Wigger, C. Beeli, E. Felder +3

Upon substituting Ca for Eu in the local-moment ferromagnet EuB $_{6}$ , the Curie temperature $T_{C}$ decreases substantially with increasing dilution of the magnetic sublattice and is…

The role of f -electrons in the Fermi surface of the heavy fermion superconductor beta-YbAlB4

E. C. T. O'Farrell, D. A. Tompsett, S. E. Sebastian +10

We present a detailed quantum oscillation study of the Fermi surface of the recently discovered Yb-based heavy fermion superconductor beta-YbAlB4 . We compare the data, obtained at…

Heavy-fermion superconductivity in CeCoIn5 at 2.3K

C. Petrovic, P. G. Pagliuso, M. F. Hundley +5

We report the observation of heavy-fermion superconducitivity in CeCoIn5 at Tc =2.3 K. When compared to the pressure-induced Tc of its cubic relative CeIn3 (Tc ~200 mK), the Tc of…

Fermi surface evolution through a heavy fermion superconductor-to-antiferromagnet transition: de Haas-van Alphen effect in Cd-substituted CeCoIn $_{5}$

C. Capan, Y-J. Jo, L. Balicas +10

We report the results of de-Haas-van-Alphen (dHvA) measurements in Cd doped CeCoIn $_{5}$ and LaCoIn $_{5}$ . Cd doping is known to induce an antiferromagnetic order in the heavy fermion…

cond-mat.str-el2017

Planar tunneling spectroscopy of the topological Kondo insulator SmB $_{6}$

L. Sun, D. -J. Kim, Z. Fisk +1

Several technical issues and challenges are identified and investigated for the planar tunneling spectroscopy of the topological Kondo insulator SmB $_{6}$ . Contrasting behaviors of t…

cond-mat.str-el2009

Local structure and site occupancy of Cd and Hg substitutions in CeTIn5 (T=Co, Rh, Ir)

C. H. Booth, E. D. Bauer, A. D. Bianchi +7

The CeTIn5 superconductors (T=Co, Rh, or Ir) have generated great interest due to their relatively Tc's, NFL behavior, and their proximity to AF order and quantum critical points.…

Anomalous doping effect on the superconducting state in CeCoIn $_{5}$ at high magnetic fields

Y. Tokiwa, R. Movshovich, F. Ronning +4

We investigated the effect of electron and hole doping on the high-field low-temperature superconducting state in CeCoIn $_{5}$ by measuring specific heat of CeCo(In $_{1 - x}$ M$_{\r…

Irreversible dynamics of the phase boundary in U(Ru0.9)Rh0.04)2Si2 and implications for ordering

A. V. Silhanek, M. Jaime, N. Harrison +10

We report measurements and analysis of the specific heat and magnetocaloric effect at the phase boundary into the single magnetic field-induced phase (phase II) of U(Ru{0.96}Rh{0.0…

Anomalous 3D bulk AC conduction within the Kondo gap of SmB $_{6}$ single crystals

N. J. Laurita, C. M. Morris, S. M. Koohpayeh +5

The Kondo insulator SmB $_{6}$ has long been known to display anomalous transport behavior at low temperatures, T $< 5$ K. In this temperatures range, a plateau is observed in the dc re…

cond-mat.str-el2021

Surface excitations relaxation in the Kondo insulator Sm $_{1 - x}$ Gd $_{x}$ B $_{6}$

J. C. Souza, M. KÃ¶nig, M. V. Ale Crivillero +7

The interplay between non-trivial topological states of matter and strong electronic correlations is one of the most compelling open questions in condensed matter physics. Due to e…

Anomalous NMR Spin-Lattice Relaxation in SrB_{6} and Ca_{1-x}La_{x}B_{6}

J. L. Gavilano, Sh. Mushkolaj, D. Rau +4

We report the results of {11}B nuclear magnetic resonance (NMR) measurements of SrB_{6} and Ca_{0.995}La_{0.05}B_{6} below room temperature. Although the electrical resistivities o…

cond-mat.str-el2018

Imaging emergent heavy Dirac fermions of a topological Kondo insulator

Harris Pirie, Yu Liu, A. Soumyanarayanan +12

Kondo insulators are primary candidates in the search for strongly correlated topological quantum phases, which may host topological order, fractionalization, and non-Abelian stati…

cond-mat.str-el2020

Metallic islands in the Kondo insulator SmB $_{6}$

J. C. Souza, P. F. S. Rosa, J. Sichelschmidt +7

The predicted interplay between Kondo physics and non-trivial topology in SmB $_{6}$ has stimulated many experimental reports, some of which are in apparent contradiction. The origi…

cond-mat.supr-con2015

Epilogue: Superconducting Materials Past, Present and Future

C. W. Chu, P. C. Canfield, R. C. Dynes +8

Experimental contributors to the field of Superconducting Materials share their informal views on the subject.

Multiple phase transitions in Ce(Rh,Ir,Co)In5 heavy-fermion superconductors

P. G. Pagliuso, R. Movshovich, A. D. Bianchi +6

Magnetic susceptibility, electrical resistivity and heat capacity data for single crystals of Ce(Rh,Ir)1-x(Co,Ir)xIn5 (0 < x < 1) have allowed us to construct a detailed phase diag…

cond-mat.supr-con2018

Magnetotransport properties in the magnetic phase of BaFe $_{2 - x}$ T $_{x}$ As $_{2}$ (T = Co,Ni): A magnetic excitations approach

J. P. PeÃ±a, M. M. Piva, P. F. S. Rosa +6

Because of their complex Fermi surfaces, the identification of the physical phenomena contributing to electronic scattering in the Fe-based superconductors is a difficult task. Her…

Evidence for local structural symmetry-breaking in Ca $_{1 - x}$ Eu $_{x}$ B $_{6}$

H. Martinho, C. Rettori, Z. Fisk +1

In this work we present a systematic Raman Scattering study in the Ca $_{1 - x}$ % Eu $_{x}$ B $_{6}$ series ( $0.00 ⩽ x ⩽ 1.00$ ). Our results are the first experimental evid…

Electronic phase separation due to magnetic polaron formation in the semimetallic ferromagnet EuB $_{6}$ - A weakly-nonlinear-transport study

A. Amyan, P. Das, J. MÃ¼ller +1

We report measurements of weakly nonlinear electronic transport, as measured by third-harmonic voltage generation $V_{3 I ¨ }$ , in the low-carrier density semimetallic ferromagnet EuB…

cond-mat.str-el2004

Suppression of the $I^^{3} - I^\pm$ structural phase transition in $C e_{0.8} L a_{0.1} T h_{0.1}$ by large magnetic fields

F. Drymiotis, J. Singleton, N. Harrison +7

The $I^^{3} - I^\pm$ transition in Ce $_{0.8}$ La $_{0.1}$ Th $_{0.1}$ is measured as a function of applied magnetic field using both resistivity and magnetization. The $I^^{3} - I^\pm$ transition tempe…

cond-mat.str-el2015

An experimental algorithm for identifying the topological nature of Kondo and mixed valence insulators

M. Neupane, N. Alidoust, Suyang Xu +9

Possible topological nature of Kondo and mixed valence insulators has been a recent topic of interest in condensed matter physics. Attention has focused on SmB6, which has long bee…

cond-mat.str-el1999

Disorder-Driven Non-Fermi-Liquid Behavior in CeRhRuSi_2

Chia-Ying Liu, D. E. MacLaughlin, A. H. Castro Neto +4

We report measurements of the bulk magnetic susceptibility and ^{29}Si nuclear magnetic resonance (NMR) linewidth in the heavy-fermion alloy CeRhRuSi_2. The linewidth increases rap…

Gd3+ rattling triggered by a "weak" M-I transition at 140-160 K in the Ce1-xGdxFe4$P12 x ~ 0.001 skutterudite compounds: an ESR study

F. A. Garcia, J. G. S. Duque, P. G. Pagliuso +3

In this work we report electron spin resonance (ESR) measurements in the semiconducting Ce1-xGdxFe4P12 (x ~ 0.001) filled skutterudite compounds. Investigation of the temperature (…

Severe Fermi Surface Reconstruction at a Metamagnetic-Transition in Ca $_{2 - x}$ Sr $_{x}$ RuO $_{4}$ (for $0.2 \leq x \leq 0.5$ )

L. Balicas, S. Nakatsuji, D. Hall +4

We report an electrical transport study in Ca $_{2 - x}$ Sr $_{x}$ RuO $_{4}$ single crystals at high magnetic fields ( $B$ ). For $x = 0.2$ , the Hall constant $R_{x y}$ decreases sharply at an…

First order transition from correlated electron semiconductor to ferromagnetic metal in single crystalline FeSi1-xGex

S. Yeo, S. Nakatsuji, A. D. Bianchi +5

The phase diagram of FeSi1-xGex, obtained from magnetic, thermal and transport measurements on single crystals, shows a first-order transition from a correlated electron semiconduc…

cond-mat.str-el2002

Magnetic Properties of Heavy Fermion Superconductors CeRhIn5 and Ce2RhIn8

Wei Bao, G. Aeppli, A. D. Christianson +7

Some recent neutron scattering works on CeRhIn5 and Ce2RhIn8, together with related resistivity and specific heat measurements, are summarized. In spite of its layered crystal stru…

Specific Heat of CeRhIn5: Pressure-Driven Evolution of the Ground State from Antiferromagnetism to Superconductivity

R. A. Fisher, F. Bouquet, N. E. Phillips +5

Measurements of the specific heat of antiferromagnetic CeRhIn5, to 21 kbar, and for 21 kbar to 70 kOe, show a discontinuous change from an antiferromagnetic ground state below 15 k…

The Origin of Weak Ferromagnetism in CaB6

M. C. Bennett, J. van Lierop, E. M. Berkeley +8

We have combined the results of magnetization and Hall effect measurements to conclude that the ferromagnetic moments of lightly doped CaB6 samples display no systematic variation…

cond-mat.str-el2020

Revisiting the Possible 4f7 5d1 Ground State of Gd Impurities in SmB6 by Electron Spin Resonance

J. C. Souza, P. F. S. Rosa, U. Burkhardt +5

The search for topological states in strongly correlated electron systems has renewed the interest in the Kondo insulator SmB6. One of the most intriguing previous results was an a…

Direct observation of the quantum critical point in heavy fermion CeRhSi $_{3}$

N. Egetenmeyer, J. L. Gavilano, A. Maisuradze +10

We report on muon spin rotation studies of the noncentrosymmetric heavy fermion antiferromagnet CeRhSi $_{3}$ . A drastic and monotonic suppression of the internal fields, at the lowes…

Robust Surface Hall Effect and Nonlocal Transport in SmB6: Indication for an Ideal Topological Insulator

D. J. Kim, S. Thomas, T. Grant +3

A topological insulator (TI) is an unusual quantum state in which the insulating bulk is topologically distinct from vacuum, resulting in a unique metallic surface that is robust a…

cond-mat.supr-con2011

Electron spin resonance study of the LaIn3-xSnx superconducting system

E. M. Bittar, C. Adriano, C. Giles +3

The LaIn3-xSnx alloy system is composed of superconducting Pauli paramagnets. For LaIn3 the superconducting critical temperature T_c is approximately 0.7 K and it shows an oscillat…

Anisotropic effect of Cd and Hg doping on Pauli limited superconductor CeCoIn $_{5}$

Y. Tokiwa, R. Movshovich, F. Ronning +6

We investigated the effect of Cd and Hg doping on the first order superconducting (SC) transition and the high field-low temperature SC state of CeCoIn $_{5}$ by measuring the specifi…

A New Heavy-Fermion Superconductor CeIrIn5: Relative of the Cuprates?

C. Petrovic, R. Movshovich, M. Jaime +5

CeIrIn5 is a member of a new family of heavy-fermion compounds and has a Sommerfeld specific heat coefficient of 720 mJ/mol-K2. It exhibits a bulk, thermodynamic transition to a su…

Hidden one-dimensional electronic structure and non-Fermi liquid angle resolved photoemission line shapes of $I^\cdot$ -Mo $_{4}$ O $_{11}$

G. -H. Gweon, S. -K. Mo, J. W. Allen +4

We report angle resolved photoemission (ARPES) spectra of $I^\cdot$ -Mo $_{4}$ O $_{11}$ , a layered metal that undergoes two charge density wave (CDW) transitions at 109 K and 30 K. We have d…

Bulk Band Gaps in Divalent Hexaborides: A Soft X-Ray Emission Study

J. D. Denlinger, G. -H. Gweon, J. W. Allen +2

Boron K-edge soft x-ray emission and absorption are used to address the fundamental question of whether divalent hexaborides are intrinsic semimetals or defect-doped bandgap insula…

Surface electronic structure of a topological Kondo insulator candidate SmB6: insights from high-resolution ARPES

M. Neupane, N. Alidoust, S. -Y. Xu +13

The Kondo insulator SmB6 has long been known to exhibit low temperature (T < 10K) transport anomaly and has recently attracted attention as a new topological insulator candidate. B…

Crystal field effects and quadrupole fluctuations in Ce $_{3}$ Au $_{3}$ Sb $_{4}$ detected by Sb NQR

S. -H. Baek, H. Sakai, H. Lee +3

We report $^{121, 123}$ Sb NQR studies on single crystals of the narrow gap semiconductor Ce3Au3Sb4. The temperature dependence of the nuclear quadrupole frequency ( $I^½_{Q}$ ), as well…

Anisotropic three-dimentional magnetic fluctuations in heavy fermion CeRhIn5

Wei Bao, G. Aeppli, J. W. Lynn +5

CeRhIn5 is a heavy fermion antiferromagnet that orders at 3.8 K. The observation of pressure-induced superconductivity in CeRhIn5 at a very high Tc of 2.1 K for heavy fermion mater…

cond-mat.supr-con2016

Strong pinning of vortices by antiferromagnetic domain boundaries in CeCo(In $_{1 - x}$ Cd $_{x}$ ) $_{5}$

Dong-Jin Jang, Luis Pedrero, L. D. Pham +2

We have studied the isothermal magnetization $M (H)$ of CeCo(In $_{1 - x}$ Cd $_{x}$ ) $_{5}$ with $x$ = 0.0075 and 0.01 down to 50 mK. Pronounced field-history dependent phenomena occur in th…

Localized f electrons in CexLa1-xRhIn5: dHvA Measurements

U. Alver, R. G. Goodrich, N. Harrison +8

Measurements of the de Haas-van Alphen effect in CexLa1-xRhIn5 reveal that the Ce 4f electrons remain localized for all x, with the mass enhancement and progressive loss of one spi…

Magnetically-driven electronic phase separation in the semimetallic ferromagnet EuB $_{6}$

P. Das, A. Amyan, J. Brandenburrg +4

From measurements of fluctuation spectroscopy and weak nonlinear transport on the semimetallic ferromagnet EuB $_{6}$ we find direct evidence for magnetically-driven electronic phase…

Unusual metamagnetism in CeIrIn $_{5}$

C. Capan, L. Balicas, T. P. Murphy +11

We report a high field investigation (up to 45 T) of the metamagnetic transition in CeIrIn $_{5}$ with resistivity and de-Haas-van-Alphen (dHvA) effect measurements in the temperature…

cond-mat.str-el2004

Large Anomalous Hall effect in a silicon-based magnetic semiconductor

N. Manyala, Y. Sidis, J. F. DiTusa +3

Magnetic semiconductors are attracting high interest because of their potential use for spintronics, a new technology which merges electronics and manipulation of conduction electr…

Crystal-fields in YbInNi4 determined with magnetic form factor and inelastic neutron scattering

A. Severing, F. Givord, J. -X. Boucherle +9

The magnetic form factor of YbInNi4 has been determined via the flipping ratios R with polarized neutron diffraction and the scattering function S(Q,w) was measured in an inelastic…

Gradual transition from insulator to semimetal of Ca $_{1 - x}$ Eu $_{x}$ B $_{6}$ with increasing Eu concentration

R. R. Urbano, P. G. Pagliuso, C. Rettori +7

The local environment of Eu $^{2 +}$ ( $4 f^{7}$ , $S = 7/2$ ) in Ca $_{1 - x}$ Eu $_{x}$ B $_{6}$ ( $0.003 ⩽ x ⩽ 1.00$ ) is investigated by means of electron spin resonance (ESR). Fo…

Crystal-field effects in the mixed-valence compounds Yb2M3Ga9 (M= Rh, Ir)

N. O. Moreno, A. Lobos, A. A. Aligia +8

Magnetic susceptibility, heat capacity, and electrical resistivity measurements have been carried out on single crystals of the intermediate valence compounds Yb2Rh3Ga9 and Yb2Ir3G…

Magnetism and superconductivity in Ce_2RhIn_8

M. Nicklas, V. A. Sidorov, H. A. Borges +5

We report the discovery of pressure-induced superconductivity, with T_c=2 K, in the heavy-fermion antiferromagnet Ce_2RhIn_8, where superconductivity and magnetic order coexist ove…

cond-mat.str-el2009

Cd-doping effects in Ce2MIn8 (M = Rh and Ir) heavy fermion compounds

C. Adriano, C. Giles, E. M. Bittar +9

Low temperature magnetic properties of Cd-doped Ce2MIn8 (M = Rh and Ir) single crystals are investigated. Experiments of temperature dependent magnetic susceptibility, heat capacit…

New Aspects of the Temperature-Magnetic Field Phase Diagram of CeB6

R. G. Goodrich, David P. Young, Donavan Hall +6

We have measured the magnetic field dependence of the paramagnetic to the field-induced high temperature antiferroquadrupolar magnetically ordered phase transition is CeB6 from 0 t…

Anomalous Superconducting Properties and Field Induced Magnetism in CeCoIn5

T. P. Murphy, Donavan Hall, E. C. Palm +7

In the heavy fermion superconductor CeCoIn5 (Tc=2.3K) the critical field is large, anisotropic and displays hysteresis. The magnitude of the critical-field anisotropy in the a-c pl…

cond-mat.mtrl-sci2017

Bulk and surface electronic properties of SmB6: a hard x-ray photoelectron spectroscopy study

Y. Utsumi, D. Kasinathan, K-T. Ko +10

We have carried out bulk-sensitive hard x-ray photoelectron spectroscopy (HAXPES) measurements on in-situ cleaved and ex-situ polished SmB6 single crystals. Using the multiplet-str…

Spectroscopic evidence for unconventional superconductivity in UBe $_{13}$

Ch. WÃ¤lti, H. R. Ott, Z. Fisk +1

Reply to cond-mat/0007006 by Gloos

Wilson ratio in Yb-substituted CeCoIn5

C. Capan, G. Seyfarth, D. Hurt +4

We have investigated the effect of Yb substitution on the Pauli limited, heavy fermion superconductor, CeCoIn $_{5}$ . Yb acts as a non-magnetic divalent substituent for Ce throughout…

cond-mat.str-el2019

Site Specific Knight Shift Measurements of the Dilute Kondo lattice System Ce $_{1 - x}$ La $_{x}$ CoIn $_{5}$

M. Lawson, B. T. Bush, A. C. Shockley +3

$^{115}$ In Nuclear magnetic resonance data are presented for a series of Ce $_{1 - x}$ La $_{x}$ CoIn $_{5}$ crystals with different La dilutions, $x$ . Multiple In(1) sites associated with di…

Topological surface state in the Kondo Insulator Samarium Hexaboride

D. J. Kim, J. Xia, Z. Fisk

Strongly correlated electron systems show many exotic properties such as unconventional superconductity, quantum criticality, and Kondo insulating behavior. In addition, the Kondo…

cond-mat.str-el2014

Temperature Dependence of Linked Gap and Surface State Evolution in the Mixed Valent Topological Insulator SmB6

J. D. Denlinger, J. W. Allen, J. -S. Kang +6

Taken together and viewed holistically, recent theory, low temperature (T) transport, photoelectron spectroscopy and quantum oscillation experiments have built a very strong case t…

cond-mat.str-el2024

Magnetic and electronic inhomogeneity in Sm $_{1 - x}$ Eu $_{x}$ B $_{6}$

M. Victoria Ale Crivillero, Priscila F. S. Rosa, Z. Fisk +3

While SmB $_{6}$ attracts attention as a possible topological Kondo insulator, EuB $_{6}$ is known to host magnetic polarons that give rise to large magnetoresistive effects above its fe…

cond-mat.str-el2006

Reversible Tuning of the Heavy Fermion Ground State in CeCoIn $_{5}$

L. D. Pham, Tuson Park, S. Maquilon +2

Cadmium-doping the heavy-fermion superconductor CeCoIn $_{5}$ at the percent level acts as an electronic tuning agent, sensitively shifting the balance between superconductivity and a…

cond-mat.str-el2022

Persistence of correlation-driven surface states in SmB6 under pressure

Soonbeom Seo, Yongkang Luo, S. M. Thomas +6

The proposed topological Kondo insulator SmB $_{6}$ hosts a bulk Kondo hybridization gap that stems from strong electronic correlations and a metallic surface state whose effective…

Incommensurate magnetic structure of CeRhIn5

Wei Bao, P. G. Pagliuso, J. L. Sarrao +4

The magnetic structure of the heavy fermion antiferromagnet CeRhIn5 is determined using neutron diffraction. We find a magnetic wave vector q_M=(1/2,1/2,0.297), which is temperatur…

Quantum oscillations in Kondo Insulator SmB $_{6}$

G. Li, Z. Xiang, F. Yu +15

In Kondo insulator samarium hexaboride SmB $_{6}$ , strong correlation and band hybridization lead to an insulating gap and a diverging resistance at low temperature. The resistance di…

cond-mat.str-el1998

Mobile anti-phase domains in lightly doped lanthanum cuprate

P. C. Hammel, B. J. Suh, J. L. Sarrao +1

Light hole doping of lanthanum cuprate strongly suppresses the onset of antiferromagnetic (AF) order. Surprisingly, it simultaneously suppresses the extrapolated zero temperature s…

Radio Frequency Tunable Oscillator Device Based on SmB6 Microcrystal

A. Stern, D. K. Efimkin, V. Galitski +2

Radio frequency tunable oscillators are vital electronic components for signal generation, characterization, and processing. They are often constructed with a resonant circuit and…

cond-mat.str-el2011

Thermally activated exchange narrowing of the Gd3+ ESR fine structure in a single crystal of Ce1-xGdxFe4P12 (x = 0.001) skutterudite

F. A. Garcia, P. A. Venegas, P. G. Pagliuso +4

We report electron spin resonance (ESR) measurements in the Gd3+ doped semiconducting filled skutterudite compound Ce1-xGdxFe4P12 (x = 0.001). As the temperature T varies from T =…

cond-mat.mtrl-sci2004

Kondo Behavior of U in CaB $_{6}$

G. A. Wigger, E. Felder, S. Weyeneth +2

Replacing U for Ca in semiconducting CaB $_{6}$ at the few at.% level induces metallic behaviour and Kondo-type phenomena at low temperatures, a rather unusual feature for U impuritie…

Different Gd3+ sites in CaB6: an ESR study

R. R. Urbano, C. Rettori, G. E. Barberis +8

The local environment of Gd3+ (4f7 S=7/2) ions in single crystals of Ca1-xGdxB6 (0.0001 < x < 0.01) is studied by means of Electron Spin Resonance (ESR). The spectra for low concen…

cond-mat.str-el2015

Conduction through subsurface cracks in bulk topological insulators

S. Wolgast, Y. S. Eo, Ã. Kurdak +2

Topological insulators (TIs) have the singular distinction of being electronic insulators while harboring metallic, conductive surfaces. In ordinary materials, defects such as crac…

cond-mat.str-el2007

Magneto-optical behaviour of EuIn_2P_2

F. Pfuner, L. Degiorgi. H. R. Ott, A. D. Bianchi +1

We report results of a magneto-optical investigation of the Zintl-phase compound EuIn $_{2}$ P $_{2}$ . The compound orders magnetically at $T_{C}$ =24 K and exhibits concomitant large magnet…

cond-mat.str-el2011

Shubnikov-de Haas measurements on LuRh2Si2

S. Friedemann, S. K. Goh, F. M. Grosche +2

We present Shubnikov-de Haas measurements on LuRh2Si2, the non-magnetic reference compound to the prototypical heavy-fermion system YbRh2Si2. We find an extensive set of orbits wit…

cond-mat.str-el2009

Evidence for the existence of Kondo coupled resonant modes in heavy fermions

L. M. Holanda, J. M. Vargas, C. Rettori +5

Electron Spin Resonance (ESR) can microscopically probe both conduction electrons (ce) and local moment (LM) spin systems in different materials. A ce spin resonance (CESR) is obse…

cond-mat.supr-con2007

Point-contact Andreev reflection spectroscopy of heavy-fermion-metal/superconductor junctions

W. K. Park, H. Stalzer, J. L. Sarrao +6

Our previous point-contact Andreev reflection studies of the heavy-fermion superconductor CeCoIn $_{5}$ using Au tips have shown two clear features: reduced Andreev signal and asymmet…

Coexistence of magnetism and superconductivity in CeRh1-xIrxIn5

P. G. Pagliuso, C. Petrovic1, R. Movshovich +5

We report a thermodynamic and transport study of the phase diagram of CeRh1-xIrxIn5. Superconductivity is observed over a broad range of doping, 0.3 < x < 1, including a substantia…

cond-mat.str-el2004

Magnetic field-tuned quantum critical point in CeAuSb_2

L. Balicas, S. Nakatsuji, H. Lee +3

Transport, magnetic and thermal properties at high magnetic fields (H) and low temperatures (T) of the heavy fermion compound CeAuSb_2 are reported. At H=0 this layered system exhi…

cond-mat.str-el2002

Bulk Band Gaps in Divalent Hexaborides

J. D. Denlinger, J. A. Clack, J. W. Allen +6

Complementary angle-resolved photoemission and bulk-sensitive k-resolved resonant inelastic x-ray scattering of divalent hexaborides reveal a >1 eV X-point gap between the valence…

cond-mat.str-el2002

Bandgap recovery and electron doping on cleaved [100] surfaces of divalent semi-metal hexaborides

J. D. Denlinger, J. A. Clack, J. W. Allen +5

This paper has been withdrawn by the authors due to new theoretical evidence and experimental proof that the semiconducting bandgap reported in this paper and ascribed to a surface…

The Fermi surface of CeCoIn5: dHvA

Donavan Hall, E. Palm, T. Murphy +7

Measurements of the de Haas - van Alphen effect in the normal state of the heavy Fermion superconductor CeCoIn5 have been carried out using a torque cantilever at temperatures rang…

Unusual Kondo-hole effect and crystal-field frustration in Nd-doped CeRhIn $_{5}$

P. F. S. Rosa, A. Oostra, J. D. Thompson +2

We investigate single crystalline samples of Ce $_{1 - x}$ Nd $_{x}$ RhIn $_{5}$ by means of X-ray diffraction, microprobe, magnetic susceptibility, heat capacity, and electrical resistiv…

High Field de Haas - van Alphen Studies of the Fermi Surfaces of LaMIn $_{5}$ (M = Co, Rh, Ir)

Donavan Hall, Luis Balicas, Z. Fisk +3

We report measurements of the de Haas - van Alphen effect on a series of compounds, LaMIn $_{5}$ (M = Co, Rh, Ir). The results show that each of the Co and Ir Fermi surfaces (FSs) e…

cond-mat.supr-con2017

Doping-induced superconductivity of ZrB $_{2}$ and HfB $_{2}$

N. Barbero, T. Shiroka, B. Delley +5

Unlike the widely studied $s$ -type two-gap superconductor MgB $_{2}$ , the chemically similar compounds ZrB $_{2}$ and HfB $_{2}$ do not superconduct above 1 K. Yet, it has been shown that s…

cond-mat.supr-con2014

Fermi-surface topology of the iron pnictide LaFe $_{2}$ P $_{2}$

We report on a comprehensive de Haas--van Alphen (dHvA) study of the iron pnictide LaFe $_{2}$ P $_{2}$ . Our extensive density-functional band-structure calculations can well explain the…

Energy scales of Lu(1-x)Yb(x)Rh2Si2 by means of thermopower investigations

U. KÃ¶hler, N. Oeschler, F. Steglich +2

We present the thermopower S(T) and the resistivity rho(T) of Lu(1-x)Yb(x)Rh2Si2 in the temperature range 3 K < T < 300 K. S(T) is found to change from two minima for dilute system…

cond-mat.supr-con2009

Superconductivity without Fe or Ni in the phosphides BaIr2P2 and BaRh2P2

N. Berry, C. Capan, G. Seyfarth +3

Heat capacity, resistivity, and magnetic susceptibility measurements confirm bulk superconductivity in single crystals of BaIr $_{2}$ P $_{2}$ (T $_{c}$ =2.1K) and BaRh $_{2}$ P $_{2}$ (T $_{c}$ = 1.0…

Phase Inhomogeneity of the Itinerant Ferromagnet MnSi at High Pressures

W. Yu, F. Zamborszky, J. D. Thompson +4

The pressure induced quantum phase transition of the weakly itinerant ferromagnet MnSi is studied using zero-field $^{29} S i$ NMR spectroscopy and relaxation. Below $P^*\approx 1.2G…

The quartet ground state in CeB $_{6}$ : an inelastic x-ray scattering study

M. Sundermann, K. Chen, H. YavaÅ +5

We investigated the ground state symmetry of the cubic hidden order compound CeB $_{6}$ by means of core level non-resonant inelastic x-ray scattering (NIXS). The information is obtai…

Fermi Surface Properties of Low Concentration Ce $_{x}$ La $_{1 - x}$ B $_{6}$ : dHvA

A. A. Teklu, R. G. Goodrich, N. Harrison +3

The de Haas-van Alphen effect is used to study angular dependent extremal areas of the Fermi Surfaces (FS) and effective masses of Ce $_{x}$ La $_{1 - x}$ B alloys for $x$ betwee…

Magnetoresistance From Quantum Interference Effects in Ferromagnets

N. Manyala, Y Siids, J. F. DiTusa +3

The desire to maximize the sensitivity of read/write heads and thus the information density of magnetic storage devices has produced an intense interest in the magnetoresistance (M…