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Abstract: Multiple energy scales are detected in measurements of the thermodynamic andtransport properties in heavy fermion metals. We demonstrate that theexperimental data on the energy scales can be well described by the scalingbehavior of the effective mass at the fermion condensation quantum phasetransition, and show that the dependence of the effective mass on temperatureand applied magnetic fields gives rise to the non-Fermi liquid behavior. Ouranalysis is placed in the context of recent salient experimental results. Ourcalculations of the non-Fermi liquid behavior, of the scales and thermodynamicand transport properties are in good agreement with the heat capacity,magnetization, longitudinal magnetoresistance and magnetic entropy obtained inremarkable measurements on the heavy fermion metal YbRh2Si2.



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

Source: https://arxiv.org/







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