Anharmonicity and Nonadiabaticity in Hydride Superconductors

[2608.14949] Anharmonicity and Nonadiabaticity in Hydride Superconductors Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Condensed Matter > Superconductivity arXiv:2608.14949 (cond-mat) [Submitted on 15 Aug 2026] Title: Anharmonicity and Nonadiabaticity in Hydride Superconductors Authors: Shashi B. Mishra , Francesco Belli , Eva Zurek , Elena R. Margine View a PDF of the paper titled Anharmonicity and Nonadiabaticity in Hydride Superconductors, by Shashi B. Mishra and 3 other authors View PDF HTML (experimental) Abstract: We study superconductivity in representative hydrides using anharmonic phonons, electron-phonon vertex corrections, and full-bandwidth Eliashberg theory. The high-pressure binary hydrides H3S, YH6, and YH9 must be treated with both anharmonic and nonadiabatic corrections, whereas the ambient-pressure PdH/PdD/PdT series is strongly anharmonic but remains adiabatic, reproducing the inverse isotope effect without sizable vertex contributions. LaBeH8 exhibits weak anharmonicity, while vertex corrections reduce the critical temperature (Tc) by approximately 4 K, leaving the predicted Tc above experiment. To identify when treatments beyond harmonic, adiabatic Migdal-Eliashberg theory are required, we introduce the anharmonic renormalization $A_{\lambda}$ and the vertex ratio $R_{V}$ as material-specific diagnostics. Comments: 21 pages, 15 figures Subjects: Superconductivity (cond-mat.supr-con) ; Materials Science (cond-mat.mtrl-sci) Cite as: arXiv:2608.14949 [cond-mat.supr-con] (or arXiv:2608.14949v1 [cond-mat.supr-con] for this version) https://doi.org/10.48550/arXiv.2608.14949 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Shashi Mishra [ view email ] [v1] Sat, 15 Aug 2026 00:21:49 UTC (4,149 KB) Full-text links: Access Paper: View a PDF of the paper titled Anharmonicity and Nonadiabaticity in Hydride Superconductors, by Shashi B. Mishra and 3 other authors View PDF HTML (experimental) TeX Source view license Current browse context: cond-mat.supr-con < prev | next > new | recent | 2026-08 Change to browse by: cond-mat cond-mat.mtrl-sci References & Citations NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) IArxiv recommender toggle IArxiv Recommender ( What is IArxiv? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab) Major funding support from

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