Critical fixed points in class D superconductors

Details Critical fixed points in class D superconductors Critical fixed points in class D superconductors

2009-06-24

arxiv.org/abs/0906.4440v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, one figure

Scientific paper

We study in detail a critical line on the phase diagram of the Cho-Fisher network model separating three different phases: metallic and two distinct localized phases with different quantized thermal Hall conductances. This system describes non-interacting quasiparticles in disordered superconductors that have neither time-reversal nor spin-rotational invariance. We find that in addition to a tricritical fixed point $W_T$ on that critical line there exist an additional repulsive fixed point $W_N$ (where the vortex disorder concentration $W_N

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