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- W2281574641 abstract "We reveal and explain a scaling behavior of the thermopower $S/T$ exhibiting by the archetypical heavy-fermion (HF) metal $rm{YbRh_2Si_2}$ under the application of magnetic field $B$ at temperatures $T$. We show that the same scaling is demonstrated by such different HF compounds as $beta$-${rm YbAlB_4}$ and the strongly correlated layered cobalt oxide $rm [BiBa_{0.66}K_{0.36}O_{2}]CoO_{2}$. Using $rm{YbRh_2Si_2}$ as an example, we demonstrate that the scaling behavior of $S/T$ is violated at the antiferromagnetic phase transition, while both the residual resistivity $rho_0$ and the density of states $N$ experience jumps at the phase transition, making the thermopower experience two jumps and change its sign. Our elucidation is based on flattening of the single-particle spectrum that profoundly affects $rho_0$ and $N$. To depict the main features of the $S/T$ behavior, we construct the $T-B$ schematic phase diagram of $rm{YbRh_2Si_2}$. Our calculated $S/T$ for the HF compounds are in good agreement with experimental facts and support our observations." @default.
- W2281574641 created "2016-06-24" @default.
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- W2281574641 date "2016-01-07" @default.
- W2281574641 modified "2023-10-09" @default.
- W2281574641 title "Scaling behavior of the thermopower of the archetypal heavy-fermion metal YbRh2Si2" @default.
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- W2281574641 doi "https://doi.org/10.1007/s11467-015-0536-3" @default.
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