Strong four-phonon interactions in α-GeTe

Strong four-phonon interactions in α-GeTe | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Strong four-phonon interactions in α-GeTe Jiawang Hong, Yongheng Li, Bin Wei, Xinyue Zhang, Qi Ren, Chao Yang, and 8 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5899133/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract High-order phonon interactions have recently garnered significant attention due to their critical role in understanding anharmonic phonon decay and accurately predicting lattice thermal conductivity κL. Here, we report a pronounced four-phonon scattering effect in α-GeTe by the inelastic neutron scattering experiment and temperature dependent molecular dynamic simulation. Strong four-phonon interactions lead to remarkably reduced intensities of imaginary dynamical susceptibility at elevated temperatures and a strong temperature dependence of phonon linewidths. The phonon dispersion nesting and strong anharmonicity at high temperatures contribute to the significant four-phonon interactions in α-GeTe. These interactions result in a deviation from the typical κL ~ T⁻¹ trend in α-GeTe, attributed to an increased scattering rate caused by the enlarged four-phonon scattering phase space at high temperature. Our work provides a detailed microscopic insight to the thermal transport of α-GeTe, offering valuable guidance for the design of advanced thermoelectric materials, and highlights the critical role of four-phonon interactions in solids at high temperatures. Physical sciences/Physics/Condensed-matter physics Physical sciences/Materials science/Condensed-matter physics Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SIGeTe0124.pdf Strong four-phonon interactions in α-GeTe Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-5899133","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":420597230,"identity":"c8600ed4-2b40-47ab-be92-ce798c8ef3bd","order_by":0,"name":"Jiawang 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