Floquet topological d+id superconductivity in the doped Hubbard model
ORAL
Abstract
We study how d-wave superconductivity of the repulsive Hubbard model in the strong-coupling regime is changed when illuminated by circularly-polarised light (CPL), using the Floquet formalism for the Gutzwiller-projected effective Hamiltonian with the time-periodic Schrieffer-Wolff transformation.
We find that CPL induces topological superconductivity with a d+id pairing, which arises from the chiral spin coupling and the three-site term generated by the CPL.
These effects become significant for various frequencies red-detuned from the Hubbard U, which are verified by calculating the phase diagram and transient dynamics of the Floquet effective Hamiltonian.
We find that CPL induces topological superconductivity with a d+id pairing, which arises from the chiral spin coupling and the three-site term generated by the CPL.
These effects become significant for various frequencies red-detuned from the Hubbard U, which are verified by calculating the phase diagram and transient dynamics of the Floquet effective Hamiltonian.
*JSPS KAKENHI (Grant Number 20K14407, JP17H06138), CREST (Core Research for Evolutional Science and Technology; Grant number JPMJCR19T3, JPMJCR18T4)
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Publication: arXiv preprint arXiv:2108.13626
Presenters
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Sota Kitamura
- Univ of Tokyo
- University of Tokyo