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Hybridization-Driven Orthorhombic Lattice Instability in URu2Si2
T. Yanagisawa, S. Mombetsu, H. Hidaka +8
We have measured the elastic constant (C11-C12)/2 in URu2Si2 by means of high-frequency ultrasonic measurements in pulsed magnetic fields H || [001] up to 61.8 T in a wide temperat…
Nuclear magnetic resonance studies of pseudospin fluctuations in URuSi
K. R. Shirer, J. T. Haraldsen, A. P. Dioguardi +13
We report Si NMR measurements in single crystals and aligned powders of URuSi in the hidden order and paramagnetic phases. The spin-lattice-relaxation data reveal ev…
Enhancement of superconductivity near the pressure-induced semiconductor-metal transition in BiS2-based compounds LnO(0.5)F(0.5)BiS2 (Ln = La, Ce, Pr, Nd)
C. T. Wolowiec, B. D. White, I. Jeon +3
Measurements of electrical resistivity were performed between 3 and 300 K at various pressures up to 2.8 GPa on the BiS2-based superconductors LnO0.5F0.5BiS2 (Ln = Pr, Nd). At lowe…
Magneto-Transport Properties of Single Crystalline LaFeAsO
C. A. McElroy, J. J. Hamlin, B. D. White +3
Measurements of magnetization, specific heat, electrical resistivity, Hall effect, and magnetoresistance on single crystalline samples of LaFeAsO grown in a NaAs flux are reported.…
Pressure-induced enhancement of superconductivity and suppression of semiconducting behavior in Ln(O0.5F0.5)BiS2 (Ln = La, Ce) compounds
C. T. Wolowiec, D. Yazici, B. D. White +2
Electrical resistivity measurements as a function of temperature between 1 K and 300 K were performed at various pressures up to 3 GPa on the superconducting layered compounds Ln(O…
Persistent non-metallic behavior in Sr2IrO4 and Sr3Ir2O7 at high pressures
D. A. Zocco, J. J. Hamlin, B. D. White +6
Iridium-based 5d transition-metal oxides are attractive candidates for the study of correlated electronic states due to the interplay of enhanced crystal-field, Coulomb and spin-or…
Superconductivity induced by electron doping in the system La1-xMxOBiS2 (M = Ti, Zr, Hf, Th)
D. Yazici, K. Huang, B. D. White +7
We report a strategy to induce superconductivity in the BiS-based compound LaOBiS. Instead of substituting F for O, we increase the charge-carrier density (electron dope) v…
Ferromagnetic quantum critical point in UCo1-xFexGe
K. Huang, J. J. Hamlin, R. E. Baumbach +5
We have carried out a comprehensive study of the UCo1-xFexGe series across the entire range of compositions 0 <= x <= 1, and report the results of x-ray diffraction, magnetization,…
Yb Valence Change in (Ce,Yb)CoIn5 from spectroscopy and bulk properties
L. Dudy, J. D. Denlinger, L. Shu +3
The electronic structure of (Ce,Yb)CoIn5 has been studied by a combination of photoemission, x-ray absorption and bulk property measurements. Previous findings of a Ce valence near…
Absence of a static in-plane magnetic moment in the "hidden-order" phase of URuSi
P. Das, R. E. Baumbach, E. D. Bauer +6
We have carried out a careful magnetic neutron scattering study of the heavy fermion compound \URuSi\ to probe the possible existence of a small magnetic moment parallel to tetrago…
Pressure-Induced Unconventional Superconducting Phase in the Topological Insulator Bi2Se3
K. Kirshenbaum, P. S. Syers, A. P. Hope +7
Simultaneous low-temperature electrical resistivity and Hall effect measurements were performed on single-crystalline Bi2Se3 under applied pressures up to 50 GPa. As a function of…
Superconductivity of F-substituted LnOBiS2 (Ln = La, Ce, Pr, Nd, Yb) compounds
D. Yazici, K. Huang, B. D. White +3
Polycrystalline samples of F-substituted LnOBiS2 (Ln = La, Ce, Pr, Nd, Yb) compounds were synthesized by solid-state reaction. The samples were characterized by x-ray diffraction m…