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Universal signatures of the metamagnetic quantum critical endpoint: Application to CeRu2Si2
F. Weickert, M. Brando, F. Steglich +2
A quantum critical endpoint related to a metamagnetic transition causes distinct signatures in the thermodynamic quantities of a compound. We argue that, irrespective of the micros…
Pressure-induced change of the pairing symmetry in superconducting CeCu2Si2
E. Lengyel, M. Nicklas, H. S. Jeevan +5
Low-temperature (T) heat-capacity measurements under hydrostatic pressure of up to p=2.1 GPa have been performed on single-crystalline CeCu2Si2. A broad superconducting (SC) region…
Development of the critical exponent at the antiferromagnetic phase transition of YbRh2Si2 under chemical pressure
C. Krellner, C. Klingner, C. Geibel +1
We present specific-heat measurements in the vicinity of the antiferromagnetic phase transition on single crystals of the alloy Yb(Rh_{1-x}Co_x)2Si2 for x<= 0.38. This study was mo…
Huge Thermoelectric Power Factor: FeSb2 versus FeAs2 and RuSb2
Peijie Sun, Niels Oeschler, Simon Johnsen +2
The thermoelectric power factor of the narrow-gap semiconductor FeSb2 is greatly enhanced in comparison to the isostructural homologues FeAs2 and RuSb2. Comparative studies of magn…
Quantum criticality in layered CeRhIn_{5-x}Sn_x compared with cubic CeIn$_{3-x}Sn_x
J. G. Donath, F. Steglich, E. D. Bauer +3
We report low-temperature thermal-expansion measurements on single crystals of the {\it layered} heavy fermion system \cri () and compare it with a previous stu…
Separation of energy scales in undoped YbRhSi under hydrostatic pressure
Yoshi Tokiwa, Philipp Gegenwart, Christoph Geibel +1
The temperature ()-magnetic field () phase diagram of YbRhSi in the vicinity of its quantum critical point is investigated by low- magnetization measurements. Our…