Dynamical Mean-Field Study of Metamagnetism in Heavy Fermion Systems

Details Dynamical Mean-Field Study of Metamagnetism in Heavy Fermion Systems Dynamical Mean-Field Study of Metamagnetism in Heavy Fermion Systems

2010-10-11

arxiv.org/abs/1010.2017v3

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages, 4 figures, accepted in J. Phys. Soc. Jpn. 80 (2011) Suppl. (Proc. ICHE2010)

Scientific paper

We investigate the metamagnetism in the periodic Anderson model with the $\bm{k}$-dependent $c-f$ mixing by using the dynamical mean-field theory combined with the exact diagonalization method. It is found that both effects of the $\bm{k}$-dependent $c-f$ mixing and strong correlation due to the Coulomb interaction between $f$ electrons are significant for determining both the magnetization and the mass enhancement factor. For the case away from the half-filling, the results is consistent with the metamagnetic behavior observed in CeRu$_2$Si$_2$.

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