Loss ofπ-junction behavior in an interacting impurity Josephson junction

1999/10/31 by Aashish A. Clerk, Vinay Ambegaokar · 3 citations
Physics and Astronomy · #Condensed matter physics #Energy (signal processing) #Impurity #Josephson effect #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Position (finance) #Quantum and electron transport phenomena #Quantum mechanics #Superconductivity #Surface and Thin Film Phenomena #cond-mat.mes-hall #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.61.9109

published as Phys. Rev. B 61, 9109 (2000) · 4 pages, 4 figures; labelling of Fig. 3 corrected; final published form, only trivial changes

arxiv created 2000/03/27 · openalex publication_date 2000/04/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Using a generalization of the noncrossing approximation which incorporates Andreev reflection, we study the properties of an infinite-U Anderson impurity coupled to two superconducting leads. In the regime where \ensuremathΔ and T_K are comparable, we find that the position of the subgap resonance in the impurity spectral function develops a strong anomalous phase dependence---its energy is a minimum when the phase difference between the superconductors is equal to \ensuremathπ. Calculating the Josephson current through the impurity, we find that \ensuremathπ-junction behavior is lost as the position of the bound state moves above the Fermi energy.

Citations

• Review of techniques in the large-Nexpansion for dilute magnetic alloys
• Andreev scattering and the Kondo effect
• Landauer formula for the current through an interacting electron region

Cited by

• Weak-coupling continuous-time quantum Monte Carlo study of the single impurity and periodic Anderson models withs-wave superconducting baths
• Rashba-induced Kondo screening of a magnetic impurity in a two-dimensional superconductor
• Quantum Phase Transition in a Minimal Model for the Kondo Effect in a Josephson Junction