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arXiv · 1704.00476

Floquet engineering of long-range p-wave superconductivity: Beyond the high-frequency limit

Zeng-Zhao Li·Chi-Hang Lam·J. Q. You
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Abstract

It has been shown that long-range {\it p}-wave superconductivity in a Kitaev chain can be engineered via an ac field with a high frequency [Benito et al., Phys. Rev. B 90, 205127 (2014)]. For its experimental realization, however, theoretical understanding of Floquet engineering with a broader range of driving frequencies becomes important. In this work, focusing on the ac-driven tunneling interactions of a Kitaev chain, we investigate effects from the leading correction to the high-frequency limit on the emergent {\it p}-wave superconductivity. Importantly, we find new engineered long-range {\it p}-wave pairing interactions that can significantly alter the ones in the high-frequency limit at long interaction ranges. We also find that the leading correction additionally generates nearest-neighbor {\it p}-wave pairing interactions with a renormalized pairing energy, long-range tunneling interactions, and in particular multiple pairs of Floquet Majorana edge states that are destroyed in the high- frequency limit.

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Zeng-Zhao Li, Chi-Hang Lam, J. Q. You. 2017-10-16. Floquet engineering of long-range p-wave superconductivity: Beyond the high-frequency limit. https://doi.org/10.1103/physrevb.96.155438

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