Cavity engineered phonon-mediated superconductivity in MgB$_2$ from first principles quantum electrodynamics
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866909475205545984 |
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| author | Lu, I-Te Shin, Dongbin Svendsen, Mark Kamper Hübener, Hannes De Giovannini, Umberto Latini, Simone Ruggenthaler, Michael Rubio, Angel |
| author_facet | Lu, I-Te Shin, Dongbin Svendsen, Mark Kamper Hübener, Hannes De Giovannini, Umberto Latini, Simone Ruggenthaler, Michael Rubio, Angel |
| contents | 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 MgB$_2$ under different cavity setups and find that in the strong light-matter coupling regime its superconducting transition temperature can be, in principles, enhanced by $\approx 73\%$ ($\approx 40\%$) in an in-plane (out-of-plane) polarized cavity. However, in a realistic cavity, we expect the T$_{\rm{c}}$ of MgB$_2$ can increase, at most, by $5$ K via photon vacuum fluctuations. 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_08122 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Cavity engineered phonon-mediated superconductivity in MgB$_2$ from first principles quantum electrodynamics Lu, I-Te Shin, Dongbin Svendsen, Mark Kamper Hübener, Hannes De Giovannini, Umberto Latini, Simone Ruggenthaler, Michael Rubio, Angel Superconductivity Materials Science Applied Physics Computational Physics 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 MgB$_2$ under different cavity setups and find that in the strong light-matter coupling regime its superconducting transition temperature can be, in principles, enhanced by $\approx 73\%$ ($\approx 40\%$) in an in-plane (out-of-plane) polarized cavity. However, in a realistic cavity, we expect the T$_{\rm{c}}$ of MgB$_2$ can increase, at most, by $5$ K via photon vacuum fluctuations. 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. |
| title | Cavity engineered phonon-mediated superconductivity in MgB$_2$ from first principles quantum electrodynamics |
| topic | Superconductivity Materials Science Applied Physics Computational Physics |
| url | https://arxiv.org/abs/2404.08122 |