Consequences of the local spin self-energy approximation on the heavy-fermion quantum phase transition
作者： Ping Sun , Gabriel Kotliar
DOI: 10.1103/PHYSREVB.71.245104
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摘要: We show, using the periodic Anderson model, that local spin self-energy approximation, as implemented in extended dynamical mean field theory (EDMFT), results a first-order phase transition persists to $T=0$. Around transition, there is finite coexistence region of paramagnetic and antiferromagnetic (AFM) phases. The bounded by two critical lines differ an electron-hole bubble at AFM ordering wave vector.
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