Transport Signatures of Floquet Majorana Fermions in Driven Topological Superconductors
Arijit Kundu, Babak Seradjeh
DOI 10.1103/PhysRevLett.111.136402 · Physical Review Letters
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Abstract
Floquet Majorana fermions are steady states of equal superposition of electrons and holes in a periodically driven superconductor. We study the experimental signatures of Floquet Majorana fermions in transport measurements and show, both analytically and numerically, that their presence is signaled by a quantized conductance sum rule over discrete values of lead bias differing by multiple absorption or emission energies at drive frequency. We also study the effects of static disorder and find that the quantized sum rule is robust against weak disorder. Thus, we offer a unique way to identify the topological signatures of Floquet Majorana fermions.
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