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Migdal effect in solid crystals and the role of nonadiabaticity

Angelo Esposito1,2,* and Andrea Rocchi1

  • *Contact author: angelo.esposito@uniroma1.it
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Phys. Rev. D 112, 075034 – Published 17 October, 2025

DOI: https://doi.org/10.1103/198q-nv94

Abstract

We systematically apply the Born-Oppenheimer approximation to show that the Migdal effect in a solid crystal is entirely due to nonadiabatic effects, namely the deviation of the wave function from exact factorization of the electronic and nuclear contributions. The matrix element obtained this way matches exactly the result found by means of a previously derived low energy effective theory.

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Phys. Rev. D 112, 075034– Published 17 October, 2025
  • Received 16 May 2025
  • Accepted 2 October 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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