Consequences of the local spin self-energy approximation on the heavy Fermion quantum phase transition

Details Consequences of the local spin self-energy approximation on the heavy Fermion quantum phase transition Consequences of the local spin self-energy approximation on the heavy Fermion quantum phase transition

2005-01-09

arxiv.org/abs/cond-mat/0501175v2

Phys. Rev. B 71, 245104 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

16 pages, 1 figure

Scientific paper

10.1103/PhysRevB.71.245104

We show, using the periodic Anderson model, that the local spin self-energy approximation, as implemented in the extended dynamical mean field theory (EDMFT), results in a first order phase transition which persists to T=0. Around the transition, there is a finite coexistence region of the paramagnetic and antiferromagnetic (AFM) phases. The region is bounded by two critical transition lines which differ by an electron-hole bubble at the AFM ordering wave vector.

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