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Absence of quantum diffusion in two-dimensional short coherence length superconductors

Research output: Contribution to journalJournal article

Published

Journal publication date8/02/1993
JournalJournal of Physics: Condensed Matter
Journal number6
Volume5
Number of pages10
Pages697-706
Original languageEnglish

Abstract

A numerical technique is used to demonstrate that excitations of a two-dimensional superconductor of length N and finite width M are localized by spatial fluctuations in the magnitude of the order parameter DELTA(r). Results obtained using numerical finite size scaling, are consistent with the presence of a line of critical points in two dimensions. No such behaviour is found in the presence of phase fluctuations only.