Phase Shift of the Asymmetric Friedel-Anderson Impurity

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• 作者：Gerd Bergmann (1)
  
• 关键词：Asymmetric Friedel ; Anderson impurity ; Kondo effect ; Anderson orthogonality catastrophe
• 刊名：Journal of Low Temperature Physics
• 出版年：2013
• 出版时间：2 - April 2013
• 年：2013
• 卷：171
• 期：1
• 页码：120-126
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• 作者单位：Gerd Bergmann (1)
  
  1. Department of Physics & Astronomy, University of Southern California, Los Angeles, CA, 90089-0484, USA
  
• ISSN：1573-7357

文摘

The ground state of the asymmetric Friedel-Anderson (aFA) impurity is calculated within the FAIR (Friedel artificially inserted resonance) theory. Its properties are investigated by means of the fidelity with different Friedel impurities and by its Friedel oscillations. Friedel impurities with a specific phase shift δ at the Fermi level possess a finite fidelity with the aFA impurity. This phase shift δ determines other properties of the aFA impurity such as the amplitude and displacement of its Friedel oscillations. One can find the parameters of a Friedel impurity which coincides in its Friedel oscillations almost perfectly with the aFA impurity, thereby avoiding an Anderson orthogonality catastrophe.