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Quantum phase transition in the heavy-fermion compound YbIrSi
H. Q. Yuan, M. Nicklas, Z. Hossain +2
We investigate the pressure-temperature phase diagram of YbIrSi by measuring the electrical resistivity . In contrast to the widely investigated YbRhSi, YbIr$…
Observation of an optical non-Fermi-liquid behavior in the heavy fermion state of YbRhSi
S. Kimura, J. Sichelschmidt, J. Ferstl +3
We report far-infrared optical properties of YbRhSi for photon energies down to 2 meV and temperatures 0.4 -- 300 K. In the coherent heavy quasiparticle state, a linear…
Metallic State in Cubic FeGe beyond its Quantum Phase Transition
P. Pedrazzini, H. Wilhelm, D. Jaccard +8
We report on results of electrical resistivity and structural investigations on the cubic modification of FeGe under high pressure. The long-wavelength helical order ( K)…
Quantum criticality in the cubic heavy-fermion system CeIn_{3-x}Sn_x
R. Kuechler, P. Gegenwart, J. Custers +5
We report a comprehensive study of CeInSn single crystals close to the antiferromagnetic (AF) quantum critical point (QCP) at …
Multiple energy scales at a quantum critical point
P. Gegenwart, T. Westerkamp, C. Krellner +6
We report thermodynamic measurements in a magnetic-field-driven quantum critical point of a heavy fermion metal, YbRhSi. The data provide evidence for an energy scale in th…
Magnetic phase transitions in the two-dimensional frustrated quantum antiferromagnet Cs2CuCl4
Y. Tokiwa, T. Radu, R. Coldea +3
We report magnetization and specific heat measurements in the 2D frustrated spin-1/2 Heisenberg antiferromagnet Cs2CuCl4 at temperatures down to 0.05 K and high magnetic fields up…