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arXiv · 1007.2201

Topological superconductors as nonrelativistic limits of Jackiw-Rossi and Jackiw-Rebbi models

Yusuke Nishida·Luiz Santos·Claudio Chamon
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Abstract

We argue that the nonrelativistic Hamiltonian of p_x+ip_y superconductor in two dimensions can be derived from the relativistic Jackiw-Rossi model by taking the limit of large Zeeman magnetic field and chemical potential. In particular, the existence of a fermion zero mode bound to a vortex in the p_x+ip_y superconductor can be understood as a remnant of that in the Jackiw-Rossi model. In three dimensions, the nonrelativistic limit of the Jackiw-Rebbi model leads to a "p+is" superconductor in which spin-triplet p-wave and spin-singlet s-wave pairings coexist. The resulting Hamiltonian supports a fermion zero mode when the pairing gaps form a hedgehoglike structure. Our findings provide a unified view of fermion zero modes in relativistic (Dirac-type) and nonrelativistic (Schrödinger-type) superconductors.

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Yusuke Nishida, Luiz Santos, Claudio Chamon. 2010-10-20. Topological superconductors as nonrelativistic limits of Jackiw-Rossi and Jackiw-Rebbi models. https://doi.org/10.1103/physrevb.82.144513

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