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Visualizing the atomic-scale origin of metallic behavior in Kondo insulators
Harris Pirie, Eric Mascot, Christian E. Matt +12
A Kondo lattice is often electrically insulating at low temperatures. However, several recent experiments have detected signatures of bulk metallicity within this Kondo insulating…
Quantum critical point in the itinerant ferromagnet NiRh
C. -L. Huang, A. M. Hallas, K. Grube +9
We report a chemical substitution-induced ferromagnetic quantum critical point in polycrystalline NiRh alloys. Through magnetization and muon spin relaxation measuremen…
Magnetic dilution and domain selection in the XY pyrochlore antiferromagnet ErTiO
J. Gaudet, A. M. Hallas, D. D. Maharaj +7
Below K, the XY pyrochlore ErTiO orders into a non-collinear, antiferromagnetic structure referred to as the state. The magnetic order in ErT…
Hidden Order Signatures in the Antiferromagnetic Phase of U(RuFe)Si
T. J. Williams, M. N. Wilson, A. A. Aczel +2
We present a comprehensive set of elastic and inelastic neutron scattering measurements on a range of Fe-doped samples of U(RuFe)Si with 0.01~~0.15.…
Gapped Excitations in the High-Pressure Antiferromagnetic Phase of URuSi
T. J. Williams, H. Barath, Z. Yamani +6
We report a neutron scattering study of the magnetic excitation spectrum in each of the three temperature and pressure driven phases of URuSi. We find qualitatively similar…
Inelastic x-ray scattering measurements on URu2Si2
D. R. Gardner, C. J. Bonnoit, R. Chisnell +3
We report high-resolution inelastic x ray scattering measurements of the acoustic phonons of URu2Si2. We observe minimal change in the phonon structure upon entering the Hidden Ord…
Antiferromagnetism and Hidden Order in Isoelectronic Doping of URuSi
M. N. Wilson, T. J. Williams, Y. -P. Cai +8
We present muon spin rotation (SR) and susceptibility measurements on single crystals of isoelectronically doped URuTSi (T = Fe, Os) for doping levels up to 50\%…
Electrodynamics of the antiferromagnetic phase in URuSi
Jesse S. Hall, M. Rahimi Movassagh, M. N. Wilson +6
We present data on the optical conductivity of URu(Fe,Os)Si. While the parent material URuSi enters the enigmatic hidden order phase below 17.5 K, an an…
Evolution of Quantum Fluctuations Near the Quantum Critical Point of the Transverse Field Ising Chain System CoNbO
A. W. Kinross, M. Fu, T. J. Munsie +4
The transverse field Ising chain (TFIC) model is ideally suited for testing the fundamental ideas of quantum phase transitions, because its well-known ground state can be ext…
Unconventional Magnetic Ground State in YbTiO
R. M. D'Ortenzio, H. A. Dabkowska, S. R. Dunsiger +12
We report low temperature specific heat and muon spin relaxation/rotation (SR) measurements on both polycrystalline and single crystal samples of the pyrochlore magnet YbTi$…
Reply to Comment on "Spin Ice: Magnetic Excitations without Monopole Signatures using Muon Spin Rotation"
S. R. Dunsiger, A. A. Aczel, C. Arguello +13
We respond to the comment of Bramwell et al (arXiv:1111.4168v1) to our original publication (S. R. Dunsiger et al, Phys. Rev. Lett. 107, 207207 (2011)), detailing muon spin rotatio…
Spin Ice: Magnetic Excitations without Monopole Signatures using Muon Spin Rotation
S. R. Dunsiger, A. A. Aczel, C. Arguello +13
Theory predicts the low-temperature magnetic excitations in spin ices consist of deconfined magnetic charges, or monopoles. A recent transverse-field (TF) muon spin rotation (muSR)…
Magnetic phase transition in V2O3 nanocrystals
V. A. Blagojevic, J. P. Carlo, L. E. Brus +7
V2O3 nanocrystals can be synthesized through hydrothermal reduction of VO(OH)2 using hydrazine as a reducing agent. Addition of different ligands to the reaction produces nanoparti…
Imaging the Fano Lattice to 'Hidden Order' Transition in URu2Si2
Andrew R. Schmidt, Mohammad H. Hamidian, Peter Wahl +6
Within a Kondo lattice, the strong hybridization between electrons localized in real space (r-space) and those delocalized in momentum-space (k-space) generates exotic electronic s…
Field-induced Bose-Einstein Condensation of triplons up to 8 K in Sr3Cr2O8
A. A. Aczel, Y. Kohama, C. Marcenat +7
Single crystals of the spin dimer system Sr3Cr2O8 have been grown for the first time. Magnetization, heat capacity, and magnetocaloric effect data up to 65 T reveal magnetic order…
Bose-Einstein Condensation of Triplons in Ba3Cr2O8
A. A. Aczel, Y. Kohama, M. Jaime +5
By performing heat capacity, magnetocaloric effect, torque magnetometry and force magnetometry measurements up to 33 T, we have mapped out the T-H phase diagram of the S = 1/2 spin…
Phase separation and suppression of critical dynamics at quantum transitions of itinerant magnets: MnSi and (SrCa)RuO
Y. J. Uemura, T. Goko, I. M. Gat-Malureanu +18
Quantum phase transitions (QPTs) have been studied extensively in correlated electron systems. Characterization of magnetism at QPTs has, however, been limited by the volume-integr…