Magnetic field dependence of the residual resistivity of the heavy-fermion metal CeCoIn5

Article

关键词: SYSTEMS;    LIQUIDS;    STATES;   

DOI  :  10.1103/PhysRevB.86.085147

来源: SCIE

【 摘 要 】

An explanation of the paradoxical behavior of the residual resistivity rho(0) of the heavy-fermion metal CeCoIn5 in magnetic fields and under pressure is developed. The source of this behavior is identified as a flattening of the single-particle spectrum, which exerts profound effects on the specific heat, thermal-expansion coefficient, and magnetic susceptibility in the normal state, the specific-heat jump at the point of superconducting phase transition, and other properties of strongly correlated electron systems in solids. It is shown that application of a magnetic field or pressure to a system possessing a flat band leads to a strong suppression of rho(0). Analysis of its measured thermodynamic and transport properties yields direct evidence for the presence of a flat band in CeCoIn5.

【 授权许可】

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