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Superconductivity-induced Anderson localization

Research output: Contribution to journalJournal article

Published

Journal publication date1/08/1998
JournalPhysical Review B
Journal number5
Volume58
Number of pages3
Pages2442-2444
Original languageEnglish

Abstract

We have studied the effect of a random superconducting order parameter on the localization of quasiparticles, by numerical finite-size scaling of the Bogoliubov-de Gennes tight-binding Hamiltonian. Anderson localization is obtained in d = 2 and a mobility edge where the states localize is observed in d = 3. The critical behavior and localization exponent are universal within error bars both for real and complex random order parameter. Experimentally these results imply a suppression of thr electronic contribution to thermal transport from states above the bulk energy gap.