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

Zeng-Zhao Li, Chi-Hang Lam, and J. Q. You
Phys. Rev. B 96, 155438 – Published 16 October 2017

Abstract

It has been shown that long-range p-wave superconductivity in a Kitaev chain can be engineered via an ac field with a high frequency [M. 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 paper, 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 p-wave superconductivity. Importantly, we find new engineered long-range 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 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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  • Received 8 April 2017

DOI:https://doi.org/10.1103/PhysRevB.96.155438

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsQuantum Information, Science & Technology

Authors & Affiliations

Zeng-Zhao Li1,2,3,*, Chi-Hang Lam4,†, and J. Q. You3,‡

  • 1Division of Solid State Physics and NanoLund, Lund University, Box 118, S-22100 Lund, Sweden
  • 2Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, 01187 Dresden, Germany
  • 3Quantum Physics and Quantum Information Division, Beijing Computational Science Research Center, Beijing 100094, China
  • 4Department of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Hong Kong, China

  • *zeng-zhao.li@ftf.lth.se
  • C.H.Lam@polyu.edu.hk
  • jqyou@csrc.ac.cn

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Vol. 96, Iss. 15 — 15 October 2017

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