Impurity Quantum Phase Transition in a Current-Carrying d-Wave Superconductor
Strongly Correlated Electrons
2013-05-30 v3 Mesoscale and Nanoscale Physics
Superconductivity
Abstract
We study an Anderson impurity embedded in a d-wave superconductor carrying a supercurrent. The low-energy impurity behavior is investigated by using the numerical renormalization group method developed for arbitrary electronic bath spectra. The results explicitly show that the local impurity state is completely screened upon the non-zero current intensity. The impurity quantum criticality is in accordance with the well-known Kosterlitz-Thouless transition.
Keywords
Cite
@article{arxiv.0804.4263,
title = {Impurity Quantum Phase Transition in a Current-Carrying d-Wave Superconductor},
author = {Hua Chen and Yezheng Wu and Shuxiang Yang and Jianhui Dai and Jian-Xin Zhu},
journal= {arXiv preprint arXiv:0804.4263},
year = {2013}
}
Comments
6 pages, 8 figures, revised version with a derivation of the host Hamiltonian by a local gauge transformation and a finite size effect analysis added as two appendices, to appear in Phys. Rev. B