Promising ferroelectric metal EuAuBi with switchable giant shift current

Promising ferroelectric metal EuAuBi with switchable giant shift current | 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 Promising ferroelectric metal EuAuBi with switchable giant shift current Guangrong Tan, Jinyu Zou, Gang Xu This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7859545/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 06 Feb, 2026 Read the published version in npj Computational Materials → Version 1 posted 9 You are reading this latest preprint version Abstract The coexistence of metallicity and ferroelectricity in ferroelectric (FE) metals defies conventional wisdom and enables novel functionalities in electronic and optoelectronic systems. However, intrinsic FE metals remain extremely rare and challenging. Here, using first-principles calculations, we identify that a huge spontaneous polarization of 16.6–20.2 µC/cm2 , a moderate switching barrier of 68.5 meV/f.u., and a low carrier concentration of ∼ 2.5 × 1020 cm−3 coexist in topological semimetal EuAuBi. Further electron-phonon coupling calculations reveal that the metallic carriers interact weakly with the FE phonon mode, consistent with the decoupled electron mechanism. Moreover , EuAuBi exhibits a pronounced bulk photovoltaic effect characterized by a giant polarization-dependent shift current with the magnitude of conductivity up to 370 µA/V2. Thus, a feasible FE metal verification setup is proposed based on the shift current measurement. These results not only demonstrate that EuAuBi is a promising FE metal, but also propose a practical route for FE metals identification, which could promote the FE metals study greatly. Physical sciences/Materials science Physical sciences/Physics Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 06 Feb, 2026 Read the published version in npj Computational Materials → Version 1 posted Editorial decision: Revision requested 20 Nov, 2025 Reviews received at journal 18 Nov, 2025 Reviews received at journal 18 Nov, 2025 Reviewers agreed at journal 05 Nov, 2025 Reviewers agreed at journal 05 Nov, 2025 Reviewers invited by journal 04 Nov, 2025 Editor assigned by journal 31 Oct, 2025 Submission checks completed at journal 26 Oct, 2025 First submitted to journal 14 Oct, 2025 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. 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