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arXiv 1002.3706cond-mat.str-el
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YbRh2Si2中的能量标度和非费米液体行为

Energy scales and the non-Fermi liquid behavior in YbRh2Si2

V. R. Shaginyan, M. Ya. Amusia, K. G. Popov, S. A. Artamonov

摘要:

在重费米子金属的热力学和输运性质的测量中检测到多个能量标度。我们证明了费米凝聚量子相变时有效质量的标度行为可以很好地描述能量标度的实验数据,并表明有效质量对温度和外加磁场的依赖性导致了非费米液体行为.我们的分析是放置在最近突出的实验结果的背景下。我们的非费米液体的行为,规模和热力学和输运性质的计算是在良好的协议与显着测量重费米子金属YbRh2Si2的热容,磁化强度,纵向磁阻和磁熵。

英文摘要:

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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