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

Hui, V. C. and Lambert, Colin (1993) Absence of quantum diffusion in two-dimensional short coherence length superconductors. Journal of Physics: Condensed Matter, 5 (6). pp. 697-706. ISSN 0953-8984

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.