Work

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

Year: 2026

Type: article

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 + i d -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.

Source: Physical review. B./Physical review. B

DOI: 10.1103/7cj5-tqys

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

Institutions: RWTH Aachen University, Max Planck Institute for the Structure and Dynamics of Matter, Columbia University, Technische Universität Braunschweig

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Deutsche Forschungsgemeinschaft, RWTH Aachen University

Awards: G272958893, Entwicklung hybrider Methoden zur Beschreibung der NichtgleichgewichtsKontrolle von Quantenmaterie, G8091994327