Floquet engineering magnetism and superconductivity in the square-lattice Hubbard model

Jan-Niklas Herre; Takuya Okugawa; Ammon Fischer; Christoph Karrasch; Dante M. Kennes

doi:10.1103/7cj5-tqys

← Back to search

Floquet engineering magnetism and superconductivity in the square-lattice Hubbard model

Jan-Niklas Herre, Takuya Okugawa, Ammon Fischer, Christoph Karrasch, Dante M. Kennes

DOI 10.1103/7cj5-tqys · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We study the interplay of magnetic order and superconductivity in the square-lattice Hubbard model under periodic driving with circularly polarized light. Formulating diagrammatic techniques based on the random-phase approximation in terms of Floquet Green's functions, allows us to analyze fluctuation-driven unconventional pairing for weak to moderate interactions. The interplay of repulsive interactions and photoassisted hopping of electrons gives rise to a rich magnetic phase diagram featuring an antiferromagnetic-to-ferromagnetic transition prior to a Floquet Lifshitz transition. Close to the antiferromagnetic transition, topological d+id-wave superconductivity prevails in the phase diagram for a wide range of drive parameters. At intermediate- to high-frequency driving near the Floquet Lifshitz transition, superconducting orders are tuned from spin-singlet d-wave to spin-triplet p-wave character, providing an effective protocol for Floquet engineering topological superconductivity.