4.6 Article

Thermal metal in network models of a disordered two-dimensional superconductor

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PHYSICAL REVIEW B
卷 65, 期 1, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.65.012506

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We study the symmetry class for localization which arises from models of noninteracting quasiparticles in disordered superconductors that have neither time-reversal nor spin-rotation invariance. Two-dimensional systems in this category, which is known as class D, can display phases with three different types of quasiparticle dynamics: metallic, localized, or with a quantized (thermal) Hall conductance. Correspondingly, them can show a variety of delocalization transitions. We illustrate this behavior by investigating numerically the phase diagrams of network models with the appropriate symmetry and show the appearance of the metallic phase.

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