FigsharePub Date : 2024-09-16DOI: 10.1021/acs.nanolett.4c02497.s001
Meng-hui Wang (10520123), Zhengxuan Wang (19679982), Guangtao Wang (363930), Haolin Song (11267500), Yuhao Fu (2524564), Lu Li (14069), Zhong-hua Cui (567935)
{"title":"High TransitionnTemperature Driven by Type-II DiracnFermions in Topological Superconductor B<sub>7</sub>Be<sub>2</sub>B<sub>7</sub> Nanosheet","authors":"Meng-hui Wang (10520123), Zhengxuan Wang (19679982), Guangtao Wang (363930), Haolin Song (11267500), Yuhao Fu (2524564), Lu Li (14069), Zhong-hua Cui (567935)","doi":"10.1021/acs.nanolett.4c02497.s001","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c02497.s001","url":null,"abstract":"Topological superconductors (TSCs)noffer a promisingnavenue forndelving into exotic states of matter and fundamental physics. We proposena strategy for realizing high transition temperatures (high-<i>T</i><sub>c</sub>) in TSCs by leveraging nontrivial topologynalongside a high carrier density near the Fermi level in metal-dopednborophenes. We identified 39 candidates with exceptional thermodynamicnstability from thousands of Be-intercalated borophenes (Be<sub>1–<i>x</i></sub>B<sub><i>x</i></sub>) via extensive structuralnsearches. Seven candidates exhibit high carrier densities, with B<sub>7</sub>Be<sub>2</sub>B<sub>7</sub> emerging as a particularly promisingncandidate. This nanosheet displays both type-I and type-II Dirac fermions,nindicative of Z2 topological metals, thereby positioningnit as an ideal platform for high-<i>T</i><sub>c</sub> TSCs.nThe high-density π electrons of B<sub>7</sub>Be<sub>2</sub>B<sub>7</sub> originating from type-II Dirac fermions, coupled with thenout-of-plane vibrations of B and Be atoms, significantly enhance thenelectron–phonon coupling (λ = 1.42), resulting in a substantiallynhigh-<i>T</i><sub>c</sub> of 31.5 K. These findings underscorenthe potential of metal-doped borophenes as a cutting-edge materialnplatform for achieving high-<i>T</i><sub>c</sub> TSCs.","PeriodicalId":523552,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147918082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}