2001/06/15 by K. V. Samokhin, M. B. Walker
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Rare-earth and actinide compounds #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.64.024507
published as Phys. Rev. B 64, 024507 (2001) · RevTeX, 5 pages, 2 figures
openalex publication_date 2001/06/15 · arxiv created 2001/07/04 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We consider the influence of a magnetic field H on quasiparticle bound states near scalar impurities in d-wave superconductors. A ``Doppler shift'' in the excitation energies induced by the supercurrent leads to several important effects. At large but finite impurity strength, there are corrections to the energy and width of the impurity-induced resonance, proportional to H2. On the other hand, in the limit of very strong impurity potential (unitary limit), the bound state is destroyed, and acquires a finite width proportional to H(lnH)^\ensuremath-1. There are also considerable changes in the asymptotic behavior of the bound-state wave functions.