Quantum hall plateau transitions in disordered superconductors

V. Kagalovsky, B. Horovitz, Y. Avishai, J. T. Chalker

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104 Scopus citations

Abstract

We study a delocalization transition for noninteracting quasiparticles moving in two dimensions, which belongs to a new symmetry class. This symmetry class can be realized in a dirty, gapless superconductor in which time-reversal symmetry for orbital motion is broken, but spin-rotation symmetry is intact. We find a direct transition between two insulating phases with quantized Hall conductances of zero and two for the conserved quasiparticles. The energy of the quasiparticles acts as a relevant symmetry-breaking field at the critical point, which splits the direct transition into two conventional plateau transitions.

Original languageEnglish
Pages (from-to)3516-3519
Number of pages4
JournalPhysical Review Letters
Volume82
Issue number17
DOIs
StatePublished - 1 Jan 1999

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