GIST Scholar
College of Natural Sciences
Department of Physics and Photon Science
1. Journal Articles
Metastable photo-induced superconductivity far above Tc
- Type
- Article
- Citation
- npj Quantum Materials, v.10, no.1
- Issued Date
- 2025-03
- Abstract
- Inspired by the striking discovery of metastable superconductivity in K3C60 at 100K, far above Tc = 20 K, we discuss possible mechanisms for long-lived, photo-induced superconductivity. Starting from a model of optically-driven Raman phonons coupled to inter-band electronic transitions, we develop a microscopic mechanism for photo-controlling the pairing interaction. Leveraging this mechanism, we first investigate long-lived superconductivity arising from the thermodynamic metastable trapping of the driven phonon. We then propose an alternative route, where the superconducting gap created by an optical drive leads to a dynamical bottleneck in the equilibration of quasi-particles. We conclude by discussing the implications of both scenarios for experiments that can be used to discriminate between them. Our work provides falsifiable explanations for the nanosecond-scale photo-induced superconductivity found in K3C60, while simultaneously offering a theoretical basis for exploring metastable superconductivity in other quantum materials. © The Author(s) 2025.
- Publisher
- Nature Research
- ISSN
- 2397-4648
- Appears in Collections:
- Department of Physics and Photon Science > 1. Journal Articles
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