Dynamical Mean-Field Study of Metamagnetism in Heavy Fermion Systems

Abstract

We investigate the metamagnetism in the periodic Anderson model with the $\mathbf{k}$-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 $\mathbf{k}$-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${}_2$.

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

References in corpus (1)

• Strong-coupling scenario of a metamagnetic transition

Cited by in corpus (2)

• Metamagnetism and Lifshitz Transitions in Models for Heavy Fermions
• Dynamical mean-field theory for the anisotropic Kondo semiconductor: Temperature and magnetic field dependence