{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T12:42:23Z","timestamp":1788266543873,"version":"build-2803163510"},"reference-count":53,"publisher":"IOP Publishing","issue":"2","license":[{"start":{"date-parts":[[2024,3,26]],"date-time":"2024-03-26T00:00:00Z","timestamp":1711411200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2024,3,26]],"date-time":"2024-03-26T00:00:00Z","timestamp":1711411200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"funder":[{"name":"Ministry of Science and Technology","award":["MOST109-2112-M-001-014-MY3"],"award-info":[{"award-number":["MOST109-2112-M-001-014-MY3"]}]},{"DOI":"10.13039\/100000181","name":"Air Force Office of Scientific Research","doi-asserted-by":"crossref","award":["FA9550-20-1-0322"],"award-info":[{"award-number":["FA9550-20-1-0322"]}],"id":[{"id":"10.13039\/100000181","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["2D Mater."],"published-print":{"date-parts":[[2024,4,1]]},"abstract":"Abstract<\/jats:title>\n For a time-reversal symmetric system, the quantum spin Hall phase is assumed to be the same as the \n \n \n \n \n \n Z<\/mml:mi>\n <\/mml:mrow>\n 2<\/mml:mn>\n <\/mml:msub>\n <\/mml:mrow>\n <\/mml:math>\n \n <\/jats:inline-formula> topological insulator phase in the existing literature. The spin Chern number \n \n \n \n \n \n C<\/mml:mi>\n <\/mml:mrow>\n s<\/mml:mi>\n <\/mml:msub>\n <\/mml:mrow>\n <\/mml:math>\n \n <\/jats:inline-formula> is presumed to yield the same topological classification as the \n \n \n \n \n \n Z<\/mml:mi>\n <\/mml:mrow>\n 2<\/mml:mn>\n <\/mml:msub>\n <\/mml:mrow>\n <\/mml:math>\n \n <\/jats:inline-formula> invariant. Here, by investigating the electronic structures of monolayer \u03b1<\/jats:italic>-phase group V elements, we uncover the presence of a topological phase in \u03b1<\/jats:italic>-Sb, which can be characterized by a spin Chern number \n \n \n \n \n \n C<\/mml:mi>\n <\/mml:mrow>\n s<\/mml:mi>\n <\/mml:msub>\n <\/mml:mrow>\n <\/mml:math>\n \n <\/jats:inline-formula> = 2, even though it is \n \n \n \n \n \n Z<\/mml:mi>\n <\/mml:mrow>\n 2<\/mml:mn>\n <\/mml:msub>\n <\/mml:mrow>\n <\/mml:math>\n \n <\/jats:inline-formula> trivial. Although \u03b1<\/jats:italic>-As and Sb would thus be classified as trivial insulators within the classification schemes, we demonstrate the existence of a phase transition between \u03b1<\/jats:italic>-As and Sb, which is induced by band inversions at two generic k<\/jats:italic> points. Without spin\u2013orbit coupling (SOC), \u03b1<\/jats:italic>-As is a trivial insulator, while \u03b1<\/jats:italic>-Sb is a Dirac semimetal with four Dirac points (DPs) located away from the high-symmetry lines. Inclusion of the SOC gaps out the DPs and induces a nontrivial Berry curvature, endowing \u03b1<\/jats:italic>-Sb with a high spin Chern number of \n \n \n \n \n \n C<\/mml:mi>\n <\/mml:mrow>\n s<\/mml:mi>\n <\/mml:msub>\n <\/mml:mrow>\n <\/mml:math>\n \n <\/jats:inline-formula> = 2. We further show that monolayer \u03b1<\/jats:italic>-Sb exhibits either a gapless band structure or a gapless spin spectrum on its edges, as expected from topological considerations.<\/jats:p>","DOI":"10.1088\/2053-1583\/ad3136","type":"journal-article","created":{"date-parts":[[2024,3,7]],"date-time":"2024-03-07T22:41:06Z","timestamp":1709851266000},"page":"025033","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":13,"title":["High spin-Chern-number insulator in \u03b1-antimonene with a hidden topological phase"],"prefix":"10.1088","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7221-5671","authenticated-orcid":true,"given":"Baokai","family":"Wang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoting","family":"Zhou","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3875-2270","authenticated-orcid":true,"given":"Yi-Chun","family":"Hung","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yen-Chuan","family":"Lin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4688-2315","authenticated-orcid":true,"given":"Hsin","family":"Lin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arun","family":"Bansil","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2024,3,26]]},"reference":[{"key":"tdmad3136bib1","doi-asserted-by":"publisher","DOI":"10.1103\/RevModPhys.88.021004","volume":"88","author":"Bansil","year":"2016","journal-title":"Rev. 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Published by IOP Publishing Ltd","name":"copyright_information","label":"Copyright Information"},{"value":"2023-11-07","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2024-03-07","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2024-03-26","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}