Mechanisms for Long-Lived, Photo-Induced Superconductivity

Chattopadhyay, S.; Eckhardt, C.; Kennes, D. M.; Sentef, M. A.; Shin, D.; Rubio, A.; Cavalleri, A.; Demler, E. A.; Michael, M.

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Mechanisms for Long-Lived, Photo-Induced Superconductivity

MPS-Authors

/persons/resource/persons258618

Eckhardt, C.
Institut für Theorie der Statistischen Physik, RWTH Aachen University and JARA-Fundamentals of Future Information Technology;
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science (CFEL);

/persons/resource/persons245033

Kennes, D. M.
Institut für Theorie der Statistischen Physik, RWTH Aachen University and JARA-Fundamentals of Future Information Technology;
Center for Free-Electron Laser Science (CFEL);
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

/persons/resource/persons182604

Sentef, M. A.
Center for Free-Electron Laser Science (CFEL);
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
H H Wills Physics Laboratory, University of Bristol;

/persons/resource/persons252093

Shin, D.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science (CFEL);
Gwangju Institute of Science and Technology;

/persons/resource/persons22028

Rubio, A.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science (CFEL);

/persons/resource/persons133811

Cavalleri, A.
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science (CFEL);
Department of Physics, Clarendon Laboratory, University of Oxford;

/persons/resource/persons280912

Michael, M.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science (CFEL);

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https://arxiv.org/abs/2303.15355
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引用

Chattopadhyay, S., Eckhardt, C., Kennes, D. M., Sentef, M. A., Shin, D., Rubio, A., Cavalleri, A., Demler, E. A., & Michael, M. (2023). Mechanisms for Long-Lived, Photo-Induced Superconductivity.

引用: https://hdl.handle.net/21.11116/0000-000C-DAEC-5

要旨

Advances in the control of intense infrared light have led to the striking discovery of metastable superconductivity in K₃C₆₀ at 100K, lasting more than 10 nanoseconds. Inspired by these experiments, we discuss possible mechanisms for long-lived, photo-induced superconductivity above T_c. We analyze a minimal model of optically-driven Raman phonons coupled to inter-band electronic transitions. Using this model, we develop a possible microscopic mechanism for photo-controlling the pairing interaction by displacively shifting the Raman mode. Leveraging this mechanism, we explore two pictures of long-lived, light-induced superconductivity far above T_c. We first investigate long-lived, photo-induced superconductivity arising from the metastable trapping of a displaced phonon coordinate. We then propose an alternate route to long-lived superconductivity. Within this paradigm, the slow equilibration of quasi-particles enables a long-lived, non-thermal superconducting gap. We conclude by discussing implications of both scenarios to experiments that can be used to discriminate between them. Our work provides falsifiable, mechanistic explanations for the nanosecond scale photo-induced superconductivity found in K₃C₆₀, while also offering a theoretical basis for exploring long-lived, non-equilibrium superconductivity in other quantum materials.