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- W2031034595 abstract "By using recently proposed effective model for heavy fermion metallic systems, the temperature dependence of the specific heat coefficient of typical heavy fermion material YbAl3 is investigated. The Hamiltonian of the band term consists of the conduction electrons described with nearly free electron method, the localized 4f electrons of Yb ions and the hybridization term between the conduction and 4f electrons. In order to take account of the correlation effect, we reconstruct the low-energy effective Hamiltonian where the low-energy bands near the Fermi level are extracted. The self-consistent perturbation theory with local approximation is applied to this Hamiltonian, so that some physical quantities are calculated. The obtained temperature dependence of the specific heat divided by temperature shows two peak structures, which are in agreement with the experimental results of YbAl3. We show that one peak structure at the very low temperature region originates from the correlation effect and the other peak structure results from the band structure." @default.
- W2031034595 created "2016-06-24" @default.
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- W2031034595 date "2010-01-01" @default.
- W2031034595 modified "2023-09-25" @default.
- W2031034595 title "Origin of anomalous specific heat coefficient of YbAl3" @default.
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- W2031034595 doi "https://doi.org/10.1088/1742-6596/200/1/012066" @default.
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