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Abstract: We present an extension of the local moment approach to the Anderson impuritymodel with spin-dependent hybridization. By employing the two-self-energydescription, as originally proposed by Logan and co-workers, we applied thesymmetry restoration condition for the case with spin-dependent hybridization.Self-consistent ground states were determined through variational minimizationof the ground state energy. The results obtained with our spin-dependent localmoment approach applied to a quantum dot system coupled to ferromagnetic leadsare in good agreement with those obtained from previous work using numericalrenormalization group calculations.



Autor: Choong H. Kim, Jaejun Yu

Fuente: https://arxiv.org/







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