Andreev Bound States in the Kondo Quantum Dots Coupled to Superconducting Leads
arXiv:cond-mat/0609333 · doi:10.1088/0953-8984/20/41/415225
Abstract
We have studied the Kondo quantum dot coupled to two superconducting leads and investigated the subgap Andreev states using the NRG method. Contrary to the recent NCA results [Clerk and Ambegaokar, Phys. Rev. B 61, 9109 (2000); Sellier et al., Phys. Rev. B 72, 174502 (2005)], we observe Andreev states both below and above the Fermi level.
5 pages, 5 figures