High-pressure transport properties of CeRu_2Ge_2

Abstract

The pressure-induced changes in the temperature-dependent thermopower S(T) and electrical resistivity ρ(T) of CeRu_2Ge_2 are described within the single-site Anderson model. The Ce-ions are treated as impurities and the coherent scattering on different Ce-sites is neglected. Changing the hybridisation Γbetween the 4f-states and the conduction band accounts for the pressure effect. The transport coefficients are calculated in the non-crossing approximation above the phase boundary line. The theoretical S(T) and ρ(T) curves show many features of the experimental data. The seemingly complicated temperature dependence of S(T) and ρ(T), and their evolution as a function of pressure, is related to the crossovers between various fixed points of the model.

arXiv comment9 pages, 10 figures

References in corpus (3)

• Spectral Properties of the Anderson Impurity Model, Comparison of Numerical Renormalization Group and Non--Crossing Approximation
• Calorimetric Investigation of CeRu2Ge2 up to 8 GPa
• Probing the phase diagram of CeRu_2Ge_2 by thermopower at high pressure

Cited by in corpus (4)

• Theory of the thermoelectricity of intermetallic compounds with Ce or Yb ions
• Enhancement of thermal transport in the degenerate periodic Anderson model
• Thermoelectric power as a probe of density of states in correlated actinide materials: the case of PuCoGa${}_5$ superconductor
• Dependence of transport coefficients of Yb(Rh${}_{1-x}$Co${}_x$)${}_2$Si${}_2$ intermetallics on temperature and cobalt concentration