Light-induced Floquet spin-triplet Cooper pairs in unconventional magnets, by Pei-Hao Fu, Sayan Mondal, Jun-Feng Liu, Jorge Cayao
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SciPost Physics Home Authoring Refereeing Submit a manuscript About Light-induced Floquet spin-triplet Cooper pairs in unconventional magnets Pei-Hao Fu, Sayan Mondal, Jun-Feng Liu, Jorge Cayao SciPost Phys. 20, 059 (2026) · published 25 February 2026 doi: 10.21468/SciPostPhys.20.2.059 pdf BiBTeX RIS Submissions/Reports Abstract The recently predicted unconventional magnets offer a new ground for exploring the formation of nontrivial spin states due to their inherent nonrelativistic momentum-dependent spin splitting. In this work, we consider unconventional magnets with $d$- and $p$-wave parities, and investigate the effect of time-periodic light drives for inducing the formation of spin-triplet phases in the normal and superconducting states. In particular, we consider unconventional magnets without and with conventional superconductivity under linearly and circularly polarized light drives and treat the time-dependent problem within Floquet formalism, which naturally unveils photon processes and Floquet bands determining the emergent phenomena. We demonstrate that the interplay between unconventional magnetism and light gives rise to a non-trivial light-matter coupling which governs the emergence of Floquet spin-triplet states with and without superconductivity that are absent otherwise. We find that photon-assisted processes promote the formation of spin densities and spin-triplet Cooper pairs between different Floquet sidebands. More precisely, the Floquet sidebands offer an additional quantum number, the Floquet index, which considerably broadens the classification of superconducting correlations that lead to Floquet spin-triplet Cooper pairs as an entirely dynamical phenomenon due to the interplay between light and unconventional magnetism. Furthermore, we discuss how the number of photons is connected to the symmetry of Cooper pairs and also explore how the distinct light drives can be used to manipulate them and probe the angular symmetry of unconventional magnets. Our results therefore unveil the potential of unconventional magnets for realizing nontrivial light-induced superconducting states. × TY - JOURPB - SciPost FoundationDO - 10.21468/SciPostPhys.20.2.059TI - Light-induced Floquet spin-triplet Cooper pairs in unconventional magnetsPY - 2026/02/25UR - https://scipost.org/SciPostPhys.20.2.059JF - SciPost PhysicsJA - SciPost Phys.VL - 20IS - 2SP - 059A1 - Fu, Pei-HaoAU - Mondal, SayanAU - Liu, Jun-FengAU - Cayao, JorgeAB - The recently predicted unconventional magnets offer a new ground for exploring the formation of nontrivial spin states due to their inherent nonrelativistic momentum-dependent spin splitting. In this work, we consider unconventional magnets with $d$- and $p$-wave parities, and investigate the effect of time-periodic light drives for inducing the formation of spin-triplet phases in the normal and superconducting states. In particular, we consider unconventional magnets without and with conventional superconductivity under linearly and circularly polarized light drives and treat the time-dependent problem within Floquet formalism, which naturally unveils photon processes and Floquet bands determining the emergent phenomena. We demonstrate that the interplay between unconventional magnetism and light gives rise to a non-trivial light-matter coupling which governs the emergence of Floquet spin-triplet states with and without superconductivity that are absent otherwise. We find that photon-assisted processes promote the formation of spin densities and spin-triplet Cooper pairs between different Floquet sidebands. More precisely, the Floquet sidebands offer an additional quantum number, the Floquet index, which considerably broadens the classification of superconducting correlations that lead to Floquet spin-triplet Cooper pairs as an entirely dynamical phenomenon due to the interplay between light and unconventional magnetism. Furthermore, we discuss how the number of photons is connected to the symmetry of Cooper pairs and also explore how the distinct light drives can be used to manipulate them and probe the angular symmetry of unconventional magnets. Our results therefore unveil the potential of unconventional magnets for realizing nontrivial light-induced superconducting states.ER - × @Article{10.21468/SciPostPhys.20.2.059, title={{Light-induced Floquet spin-triplet Cooper pairs in unconventional magnets}}, author={Pei-Hao Fu and Sayan Mondal and Jun-Feng Liu and Jorge Cayao}, journal={SciPost Phys.}, volume={20}, pages={059}, year={2026}, publisher={SciPost}, doi={10.21468/SciPostPhys.20.2.059}, url={https://scipost.org/10.21468/SciPostPhys.20.2.059},} Ontology / Topics See full Ontology or Topics database. Magnetic phases Periodically-driven (Floquet) systems Superconductivity/superconductors Authors / Affiliations: mappings to Contributors and Organizations See all Organizations. 1 Pei-Hao Fu, 2 Sayan Mondal, 1 Jun-Feng Liu, 2 Jorge Cayao 1 广州大学 / Guangzhou University 2 Uppsala universitet / Uppsala University Funders for the research work leading to this publication Carl Tryggers Stiftelse för Vetenskaplig Forskning Göran Gustafssons Stiftelser National Natural Science Foundation of China [NSFC] Vetenskapsrådet / Swedish Research Council