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# Title: Floquet topological $d+id$ superconductivity induced by chiral many-body interactions

Abstract: We study how a $d$-wave superconductivity is changed when illuminated by circularly-polarised light (CPL) in the repulsive Hubbard model in the strong-coupling regime. We adopt the Floquet formalism for the Gutzwiller-projected effective Hamiltonian with the time-periodic Schrieffer-Wolff transformation. We find that CPL induces a topological superconductivity with a $d+id$ pairing, which arises from the chiral spin coupling and the three-site term generated by the CPL. The latter term remains significant even for low frequencies and low intensities of the CPL. This is clearly reflected in the obtained phase diagram against the laser intensity and temperature for various frequencies red-detuned from the Hubbard $U$, with the transient dynamics also examined. The phenomenon revealed here can open a novel, dynamical way to induce a topological superconductivity.
 Comments: 13 pages, 6 figures Subjects: Strongly Correlated Electrons (cond-mat.str-el); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Superconductivity (cond-mat.supr-con) Journal reference: Commun. Phys. 5, 174 (2022) DOI: 10.1038/s42005-022-00936-w Cite as: arXiv:2108.13626 [cond-mat.str-el] (or arXiv:2108.13626v2 [cond-mat.str-el] for this version)

## Submission history

From: Sota Kitamura [view email]
[v1] Tue, 31 Aug 2021 05:35:03 GMT (5453kb,D)
[v2] Thu, 3 Mar 2022 01:32:13 GMT (5456kb,D)

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