Random walks and Anderson localization in a three-dimensional class C network model.
We study the disorder-induced localization transition in a three-dimensional network model that belongs to symmetry class C. The model represents quasiparticle dynamics in a gapless spin-singlet superconductor without time-reversal invariance. It is a special feature of network models with this symmetry that the conductance and density of states can be expressed as averages in a classical system of dense, interacting random walks. Using this mapping, we present a more precise numerical study of critical behavior at an Anderson transition than has been possible previously in any context.
Ortuño
M
M
Departamento de Física, Universidad de Murcia, Murcia 30.071, Spain.
Somoza
A M
AM
Chalker
J T
JT