Reentrant topological phase transitions in a disordered spinless superconducting wire

Rieder, Maria Theresa and Brouwer, Piet W. and Adagideli, İnanç (2013) Reentrant topological phase transitions in a disordered spinless superconducting wire. Physical Review B, 88 (6). ISSN 1098-0121 (Print) 1550-235X (Online)

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Official URL: http://dx.doi.org/10.1103/PhysRevB.88.060509

Abstract

In a one-dimensional spinless p-wave superconductor with coherence length \xi, disorder induces a phase transition between a topologically nontrivial phase and a trivial insulating phase at the critical mean free path l=\xi/2. Here, we show that a multichannel spinless p-wave superconductor goes through an alternation of topologically trivial and nontrivial phases upon increasing the disorder strength, the number of phase transitions being equal to the channel number N. The last phase transition, from a nontrivial phase into the trivial phase, takes place at a mean free path l = \xi/(N+1), parametrically smaller than the critical mean free path in one dimension. Our result is valid in the limit that the wire width W is much smaller than the superconducting coherence length \xi.

Item Type: Article Article Number: 060509 Q Science > QC PhysicsQ Science > QC Physics > QC176-176.9 Solids. Solid state physics 23150 İnanç Adagideli 17 Jan 2014 15:58 17 Jan 2014 15:58

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