On the local quasiparticle density of states within the asymmetric Anderson model |
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Authors: | M Salomaa |
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Institution: | Department of Physics, University of California, Los Angeles, CA 90024, USA |
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Abstract: | We calculate the local density of states for the asymmetric Anderson model by applying a self-consistent perturbation approximation for the impurity electron's self-energy. The three-resonance structure obtained in the symmetric case at low temperatures, which features a narrow central peak at the Fermi level, is found to transform into a broad single resonance with increasing asymmetry. For any asymmetry the spectral density function approaches in the high temperature limit a broad two-resonance structure. |
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