Cavity engineered phonon-mediated superconductivity in MgB2 from first 
principles quantum electrodynamics

Lu, I-T.; Shin, D.; Hübener, H.; de Giovannini, U.; Latini, S.; Ruggenthaler, M.; Rubio, A.

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Cavity engineered phonon-mediated superconductivity in MgB₂ from first principles quantum electrodynamics

MPS-Authors

/persons/resource/persons283005

Lu, I-T.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;

/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;
Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST);

/persons/resource/persons221951

Hübener, H.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;

/persons/resource/persons221949

de Giovannini, U.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;
Università degli Studi di Palermo, Dipartimento di Fisica e Chimica—Emilio Segrè;

/persons/resource/persons226549

Latini, S.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;
Department of Physics, Technical University of Denmark;

/persons/resource/persons30964

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

/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;
Center for Computational Quantum Physics (CCQ), The Flatiron Institute;

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https://arxiv.org/abs/2404.08122
(Preprint)

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2404.08122.pdf
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Citation

Lu, I.-T., Shin, D., Hübener, H., de Giovannini, U., Latini, S., Ruggenthaler, M., et al. (2024). Cavity engineered phonon-mediated superconductivity in MgB₂ from first principles quantum electrodynamics.

Cite as: https://hdl.handle.net/21.11116/0000-000F-2D18-5

Abstract

Strong laser pulses can control superconductivity, inducing non-equilibrium transient pairing by leveraging strong-light matter interaction. Here we demonstrate theoretically that equilibrium ground-state phonon-mediated superconductive pairing can be affected through the vacuum fluctuating electromagnetic field in a cavity. Using the recently developed ab initio quantum electrodynamical density-functional theory approximation, we specifically investigate the phonon-mediated superconductive behavior of MgB₂ under different cavity setups and find that in the strong-light matter coupling regime its superconducting transition temperature can be enhanced by ≈73% (≈40%) in an in-plane (out-of-plane) polarized cavity. The results highlight that strong-light matter coupling in extended systems can profoundly alter material properties in a non-perturbative way by modifying their electronic structure and phononic dispersion at the same time. Our findings indicate a pathway to the experimental realization of light-controlled superconductivity in solid-state materials at equilibrium via cavity-material engineering.