Transport properties of Floquet topological superconductors at the transition from the topological phase to the Anderson localized phase
Pei Wang, Qing-feng Sun, X. C. Xie
DOI 10.1103/PhysRevB.90.155407 · Physical Review B
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Abstract
The Floquet topological superconducting state is a nonequilibrium time-periodic state hosting Majorana fermions. We study its transport properties by using the Kitaev model with time-periodic incommensurate potentials, which experiences phase transition from the Floquet topological superconducting phase to the Anderson localized phase with increasing driving strength. We study both the real time dynamics of the current and the nonanalytic behavior of the tunneling conductance at the transition. Especially, we find that the tunneling conductance changes continuously at the transition, being a finite value in the presence of Floquet-Majorana fermions, but drops to zero as the Majorana fermions vanish. For a special choice of parameters, the Majorana fermions revive at a larger driving strength, accompanied by the revival of conductances.
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