Majorana Zero Modes Protected by a Hopf Invariant in Topologically Trivial Superconductors
Zhongbo Yan, Ren Bi, Zhong Wang
DOI 10.1103/PhysRevLett.118.147003 · Physical Review Letters
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Abstract
Majorana zero modes are usually attributed to topological superconductors. We study a class of two-dimensional topologically trivial superconductors without chiral edge modes, which nevertheless host robust Majorana zero modes in topological defects. The construction of this minimal single-band model is facilitated by the Hopf map and the Hopf invariant. This work will stimulate investigations of Majorana zero modes in superconductors in the topologically trivial regime.
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