Publications (55)
Normal Fermi Surface in the Nodal Superconductor CeCoIn Revealed via Thermal Conductivity
Sangyun Lee, Duk Y. Kim, Priscila F. S. Rosa +5
The thermal conductivity of heavy-fermion superconductor CeCoIn was measured with a magnetic field rotating in the tetragonal a-b plane, with the heat current in the anti-nodal…
Reply to: Low-frequency quantum oscillations in LaRhIn: Dirac point or nodal line?
Chunyu Guo, A. Alexandradinata, Carsten Putzke +16
We thank G.P. Mikitik and Yu.V. Sharlai for contributing this note and the cordial exchange about it. First and foremost, we note that the aim of our paper is to report a methodolo…
Fully gapped superconductivity in SrNiP
Nobuyuki Kurita, Filip Ronning, Corneliu F. Miclea +4
We investigated the superconducting gap structure of SrNiP (=1.4 K) via low-temperature magneto-thermal conductivity measurements. Zero field thermal condu…
Spectroscopic evidence for two-gap superconductivity in the quasi-one dimensional chalcogenide NbPdS
Eunsung Park, Xin Lu, Filip Ronning +4
We present the first direct evidence for two-band superconductivity in the quasi-one dimensional chalcogenide NbPdS. Soft point contact spectroscopic measureme…
Temperature dependence of quantum oscillations from non-parabolic dispersions
Chunyu Guo, A. Alexandradinata, Carsten Putzke +16
The phase offset of quantum oscillations is commonly used to experimentally diagnose topologically non-trivial Fermi surfaces. This methodology, however, is inconclusive for spin-o…
Observation of Dirac-Like Semi-Metallic Phase in NdSb
Madhab Neupane, M. Mofazzel Hosen, Ilya Belopolski +7
The search of new topological phases of matter is one of the new directions in condensed matter physics. Recent experimental realizations of Dirac semimetal phases pave the way to…
Inducing superconductivity in Weyl semi-metal microstructures by selective ion sputtering
Maja D. Bachmann, Nityan Nair, Felix Flicker +7
By introducing a superconducting gap in Weyl- or Dirac semi-metals, the superconducting state inherits the non-trivial topology of their electronic structure. As a result, Weyl sup…
LDA+DMFT Approach to Magnetocrystalline Anisotropy of Strong Magnets
Jian-Xin Zhu, Marc Janoschek, Richard Rosenberg +5
The new challenges posed by the need of finding strong rare-earth free magnets demand methods that can predict magnetization and magnetocrystalline anisotropy energy (MAE). We argu…
Local aging effects in PuB: Growing inhomogeneity and slow dynamics of local-field fluctuations probed by Pu NMR
Seth B. Blackwell, Riku Yamamoto, Sean M. Thomas +6
The effect of self-irradiation damage can influence many properties of a radioactive material. Actinide materials involving the decay through alpha radiation have been frequently s…
Structure and Anisotropic Properties of BaFe2-xNixAs2 (x = 0, 1, 2) Single Crystals
Athena S. Sefat, Rongying Jin, Michael A. McGuire +5
The crystal structure, anisotropic electrical resistivity and magnetic susceptibility, as well as specific heat results from single crystals of BaFe2As2, BaNi2As2, and BaFeNiAs2 ar…
Fabrication of microstructured devices of the unconventional superconductor CeCoIn5 for investigations of isolated grain boundaries
Sanu Mishra, Sean M. Thomas, Rod Mccabe +2
Grain boundaries are critical for determining the functionality of polycrystalline materials. Here we present on the structural transport properties of grain boundaries in the…
DFT+DMFT study of dopant effect in a heavy fermion compound CeCoIn5
Hong Chul Choi, Eric D. Bauer, Filip Ronning +1
We study the dopant-induced inhomogeneity effect on the electronic properties of heavy fermionCeCoIn5using a combined approach of density functional theory (DFT) and dynamical mean…
Controlling superconductivity of CeIrIn microstructures by substrate selection
Maarten R. van Delft, Maja D. Bachmann, Carsten Putzke +5
Superconductor/metal interfaces are usually fabricated in heterostructures that join these dissimilar materials. A conceptually different approach has recently exploited the strain…
Weyl Fermion Magneto-Electrodynamics and Ultra-low Field Quantum Limit in TaAs
Zhengguang Lu, Patrick Hollister, Mykhaylo Ozerov +6
Topological semimetals are predicted to exhibit unconventional electrodynamics, but a central experimental challenge is singling out the contributions from the topological bands. T…
Light-Driven Nanoscale Vectorial Currents
Jacob Pettine, Prashant Padmanabhan, Teng Shi +16
Controlled charge flows are fundamental to many areas of science and technology, serving as carriers of energy and information, as probes of material properties and dynamics, and a…
Exploring the apparent violation of the Mott relation in a noncentrosymmetric kagome ferromagnet
Benjamin Kostroun, Tomoya Asaba, Sean M. Thomas +4
In magnetic topological materials, time-reversal symmetry breaking gives rise to topological point and line nodes with distinctive signatures in the anomalous Hall and anomalous Ne…
Interplay of the spin density wave and a possible Fulde-Ferrell-Larkin-Ovchinnikov state in in rotating magnetic field
Shi-Zeng Lin, Duk Y. Kim, Eric D. Bauer +3
The -wave superconductor has been proposed as a strong candidate for supporting the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state near the low-temperature bo…
One-dimensionality signature in optical conductivity of heavy-fermion CeIrB
Bo Gyu Jang, Kenneth R. O'Neal, Christopher Lane +7
In low dimensions, the combined effects of interactions and quantum fluctuations can lead to dramatically new physics distinct from that existing in higher dimensions. Here, we inv…
Local observation of linear- superfluid density and anomalous vortex dynamics in URuSi
Yusuke Iguchi, Irene P. Zhang, Eric D. Bauer +3
The heavy fermion superconductor URuSi is a candidate for chiral, time-reversal symmetry-breaking superconductivity with a nodal gap structure. Here, we microscopically vis…
Field induced density wave in the heavy fermion compound CeRhIn5
Philip J. W. Moll, Bin Zeng, Luis Balicas +4
Metals containing Ce often show strong electron correlations due to the proximity of the 4f state to the Fermi energy, leading to strong coupling with the conduction electrons. Thi…
Evidence for easy-plane XY ferromagnetism in heavy-fermion quantum-critical CeRh6Ge4
Riku Yamamoto, Sejun Park, Zachary W. Riedel +6
We report Ge nuclear quadrupole resonance (NQR) and magnetic resonance (NMR) spectroscopy in the heavy-fermion quantum-critical ferromagnet CeRhGe. NQR and NMR spect…
Phonons, Q-dependent Kondo spin fluctuations, and 4/phonon resonance in YbAl
Andrew D. Christianson, Victor R. Fanelli, Lucas Lindsay +7
The intermediate valence (IV) compound YbAl exhibits nonintegral valence (Yb 4 (5d6s) where z = 2+n = 2.75) in a moderately heavy (m* = 20-30me) ground stat…
Design Principles for Quasi-Isotropic Exchange in Rare-Earth Quantum Magnets
Kotaro Shimizu, Esteban Agustin Ghioldi, Filip Ronning +1
Rare-earth quantum materials provide a promising platform for emergent phenomena ranging from quantum spin liquids with long-range entanglement to topological magnetic textures. Ho…
Robust narrow-gap semiconducting behavior in square-net LaCdAs
Mario M. Piva, Marein C. Rahn, Sean M. Thomas +6
ABSTRACT: Narrow-gap semiconductors are sought-after materials due to their potential for long-wavelength detectors, thermoelectrics, and more recently non-trivial topology. Here w…
Understanding Magnetic Properties of Actinide-Based Compounds from Machine Learning
Ayana Ghosh, Filip Ronning, Serge Nakhmanson +1
Actinide and lanthanide-based materials display exotic properties that originate from the presence of itinerant or localized f-electrons and include unconventional superconductivit…
Quantum well states in fractured crystals of the heavy fermion material CeCoIn
Nicolas Gauthier, Jonathan A. Sobota, Makoto Hashimoto +6
Quantum well states appear in metallic thin films due to the confinement of the wave function by the film interfaces. Using angle-resolved photoemission spectroscopy, we unexpected…
Imaging the magnetic states in an actinide ferromagnet UMnGe
Xinzhou Tan, Morgann Berg, Jeehoon Kim +5
We present studies of the magnetic domain structure of UMnGe single crystals using a home-built low temperature magnetic force microscope. The material has two distinct mag…
Thermal and magnetic properties of a low-temperature antiferromagnet CePtSn
Nobuyuki Kurita, Han-Oh Lee, Yoshi Tokiwa +10
We report specific heat () and magnetization () of single crystalline CePtSn at temperature down to 50mK and in fields up to 3T. exhibits a shar…
Spatially modulated heavy-fermion superconductivity in CeIrIn5
Maja D. Bachmann, G. M. Ferguson, Florian Theuss +20
The ability to spatially modulate the electronic properties of solids has led to landmark discoveries in condensed matter physics as well as new electronic applications. Although c…
Thermodynamic and electrical transport properties of UTe under uniaxial stress
Clément Girod, Callum R. Stevens, Andrew Huxley +8
Despite intense experimental efforts, the nature of the unconventional superconducting order parameter of UTe remains elusive. This puzzle stems from different reported numbers…
Microscopic imaging homogeneous and single phase superfluid density in UTe
Yusuke Iguchi, Huiyuan Man, S. M. Thomas +3
The spin-triplet superconductor UTe shows spontaneous time-reversal symmetry breaking and multiple superconducting phases in some crystals, implying chiral superconductivity. H…
Intertwined Orders in Heavy-Fermion Superconductor CeCoIn
Duk Y. Kim, Shi-Zeng Lin, Franziska Weickert +5
The appearance of spin-density-wave (SDW) magnetic order in the low-temperature and high-field corner of the superconducting phase diagram of CeCoIn is unique among unconventio…
Magnetic torque anomaly in the quantum limit of the Weyl semi-metal NbAs
Philip J. W. Moll, Andrew C. Potter, Brad Ramshaw +9
Electrons in materials with linear dispersion behave as massless Weyl- or Dirac-quasiparticles, and continue to intrigue physicists due to their close resemblance to elusive ultra-…
Evolution of magnetic bubble domains in the uniaxial ferromagnet CeRuGaB inferred from the Hall effect and ac magnetic susceptibility
Peter E. Siegfried, Mark Maus, Alexander C. Bornstein +6
We study the Hall effect, AC magnetic susceptibility (), and magnetic force microscopy of the uniaxial ferromagnet CeRuGaB with a centrosymmetric crystal struc…
Non-monotonic pressure dependence of high-field nematicity and magnetism in CeRhIn
Toni Helm, Audrey D. Grockowiak, Fedor F. Balakirev +9
CeRhIn provides a textbook example of quantum criticality in a heavy fermion system: Pressure suppresses local-moment antiferromagnetic (AFM) order and induces superconductivit…
Interwoven atypical quantum states in CeLiBi
Mitchell M. Bordelon, Clément Girod, Filip Ronning +7
We report the discovery of CeLiBi, the first example of a material in the tetragonal Ce ( = transition metal; = pnictogen) family wherein an alkali cation replaces…
BaT2As2 Single Crystals (T = Fe, Co, Ni) and Superconductivity upon Co-doping
Athena S. Sefat, David J. Singh, Rongying Jin +4
The crystal structure and physical properties of BaFe2As2, BaCo2As2, and BaNi2As2 single crystals are surveyed. BaFe2As2 gives a magnetic and structural transition at TN = 132(1) K…
Hybridization effect on the X-ray absorption spectra for actinide materials: Application to PuB
Wei-ting Chiu, Roxanne M. Tutchton, Giacomo Resta +5
Studying the local moment and 5-electron occupations sheds insight into the electronic behavior in actinide materials. X-ray absorption spectroscopy (XAS) has been a powerful to…
Evidence for incommensurate antiferromagnetism in nonsymmorphic UPdBi
Sanu Mishra, Caitlin S. Kengle, Joe D. Thompson +4
The intersection between nonsymmorphic symmetry and electronic correlations has emerged as a platform for topological Kondo semimetallic states and unconventional spin textures. He…
Dirac fermions in the heavy-fermion superconductors Ce(Co,Rh,Ir)In
Kent R. Shirer, Yan Sun, Maja D. Bachmann +13
The Ce(Co,Rh,Ir)In family of ``Ce-115'' materials hosts an abundance of correlated electron behavior, including heavy-fermion physics, magnetism, superconductivity and nematici…
Large magnetic penetration depth and thermal fluctuations in a Ca(PtAs)[(FePt)As] (x=0.097) single crystal
Jeehoon Kim, Filip Ronning, N. Haberkorn +6
We have measured the temperature dependence of the absolute value of the magnetic penetration depth in a Ca(PtAs)[(FePt)As]$_{5…
Complex electronic structure evolution of NdSb across the magnetic transition
Anup Pradhan Sakhya, Baokai Wang, Firoza Kabir +12
The rare-earth monopnictide (REM) family, which hosts magnetic ground states with extreme magnetoresistance, has established itself as a fruitful playground for the discovery of in…
Uncovering Weyl Fermions in the Quantum Limit of NbP
K. A. Modic, Tobias Meng, Filip Ronning +3
The Fermi surface topology of a Weyl semimetal (WSM) depends strongly on the position of the chemical potential. If it resides close to the band touching points (Weyl nodes), as it…
Local characterization of a heavy-fermion superconductor via sub-Kelvin magnetic force microscopy
Dirk Wulferding, Geunyong Kim, Hoon Kim +5
Using magnetic force microscopy operating at sub-Kelvin temperatures we characterize the heavy-fermion superconductor CeCoIn. We pinpoint the absolute London penetration depth…
Anisotropic hybridization in CeRhSn
Thomas U. Böhm, Nicholas S. Sirica, Bo Gyu Jang +6
The optical conductivity of CeRhSn was studied by broadband infrared spectroscopy. Temperature-dependent spectral weight transfer occurs over high energy (eV) and…
Switching dynamics of the spin density wave in superconducting CeCoIn5
Duk Y. Kim, Shi-Zeng Lin, Eric D. Bauer +3
The ordering wave vector of a spin density wave (SDW), stabilized within the superconducting state of in a high magnetic field, has been shown to b…
Putative excitonic insulating state in narrow-gap semiconductor LaCdAs
Caitlin S. Kengle, Noah Schnitzer, Elizabeth A. Peterson +8
Excitonic insulators are electronically-driven phases of matter characterized by the spontaneous condensation of electron-hole pairs. Here we show that LaCdAs undergoes…
Electronic Correlation and Magnetism in the Ferromagnetic Metal Fe3GeTe2
Jian-Xin Zhu, Marc Janoschek, D. S. Chaves +9
Motivated by the search for design principles of rare-earth-free strong magnets, we present a study of electronic structure and magnetic properties of the ferromagnetic metal Fe3Ge…
Characterization of thin-film NbN superconductor for single-photon detection by transport measurements
Shi-Zeng Lin, Oscar Ayala-Valenzuela, Ross D. McDonald +9
The fabrication of high-quality thin superconducting films is essential for single-photon detectors. Their device performance is crucially affected by their material parameters, th…
Uniaxial "nematic-like" electronic structure and Fermi surface of untwinned CaFe2As2
Qiang Wang, Zhe Sun, Eli Rotenberg +8
Obtaining the electronic structure of the newly discovered iron-based superconductors is the key to understanding the mechanism of their high-temperature superconductivity. We used…
Superconductivity by alloying the topological insulator SnBi2Te4
Michael A. McGuire, Heda Zhang, Andrew F. May +7
Alloying indium into the topological insulator Sn1-xInxBi2Te4 induces bulk superconductivity with critical temperatures Tc up to 1.85 K and upper critical fields up to about 14 kOe…
Hydrostatic pressure studies on non-superconducting UTe2
M. O. Ajeesh, Joe D. Thompson, Eric D. Bauer +3
We report the temperature-pressure phase diagram of a UTe single crystal that does not undergo a bulk superconducting transition but shows filamentary superconductivity with a…
Anisotropic magnetotransport properties of the heavy-fermion superconductor CeRhAs
Sanu Mishra, Yu Liu, Eric D. Bauer +2
We report anisotropic resistivity measurements of the heavy-fermion superconductor CeRhAs in magnetic fields up to 16 T and temperatures down to 0.35 K. The measured CeRh$_…
Magnetic edge fields in UTe near zero background fields
Yusuke Iguchi, Huiyuan Man, S. M. Thomas +5
Chiral superconductors are theorized to exhibit spontaneous edge currents. Here, we found magnetic fields at the edges of UTe, a candidate odd-parity chiral superconductor, tha…
Quantum oscillation and topology change of the uncondensed Landau Fermi surface in superconducting CeCoIn5
Sangyun Lee, Duk. Y. Kim, Andrew J. Woods +5
Metals typically have multiple Fermi surface sheets, and when they enter the superconducting state, some electrons on these sheets may remain uncondensed, or their superconducting…