Energy scales and the non-Fermi liquid behavior in YbRh2Si2

Details Energy scales and the non-Fermi liquid behavior in YbRh2Si2 Energy scales and the non-Fermi liquid behavior in YbRh2Si2

2010-02-19

arxiv.org/abs/1002.3706v1

JETP Lett. 90, 47 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 8 figures

Scientific paper

10.1134/S0021364009130104

Multiple energy scales are detected in measurements of the thermodynamic and transport properties in heavy fermion metals. We demonstrate that the experimental data on the energy scales can be well described by the scaling behavior of the effective mass at the fermion condensation quantum phase transition, and show that the dependence of the effective mass on temperature and applied magnetic fields gives rise to the non-Fermi liquid behavior. Our analysis is placed in the context of recent salient experimental results. Our calculations of the non-Fermi liquid behavior, of the scales and thermodynamic and transport properties are in good agreement with the heat capacity, magnetization, longitudinal magnetoresistance and magnetic entropy obtained in remarkable measurements on the heavy fermion metal YbRh2Si2.

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