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Article: Two-Dimensional Second-Order Topological Insulator in Graphdiyne

TitleTwo-Dimensional Second-Order Topological Insulator in Graphdiyne
Authors
Issue Date2019
Citation
Physical Review Letters, 2019, v. 123, n. 25, article no. 256402 How to Cite?
AbstractA second-order topological insulator (SOTI) in d spatial dimensions features topologically protected gapless states at its (d-2)-dimensional boundary at the intersection of two crystal faces, but is gapped otherwise. As a novel topological state, it has been attracting great interest, but it remains a challenge to identify a realistic SOTI material in two dimensions (2D). Here, based on combined first-principles calculations and theoretical analysis, we reveal the already experimentally synthesized 2D material graphdiyne as the first realistic example of a 2D SOTI, with topologically protected 0D corner states. The role of crystalline symmetry, the robustness against symmetry breaking, and the possible experimental characterization are discussed. Our results uncover a hidden topological character of graphdiyne and promote it as a concrete material platform for exploring the intriguing physics of higher-order topological phases.
Persistent Identifierhttp://hdl.handle.net/10722/335027
ISSN
2023 Impact Factor: 8.1
2023 SCImago Journal Rankings: 3.040
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSheng, Xian Lei-
dc.contributor.authorChen, Cong-
dc.contributor.authorLiu, Huiying-
dc.contributor.authorChen, Ziyu-
dc.contributor.authorYu, Zhi Ming-
dc.contributor.authorZhao, Y. X.-
dc.contributor.authorYang, Shengyuan A.-
dc.date.accessioned2023-10-24T08:28:33Z-
dc.date.available2023-10-24T08:28:33Z-
dc.date.issued2019-
dc.identifier.citationPhysical Review Letters, 2019, v. 123, n. 25, article no. 256402-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/335027-
dc.description.abstractA second-order topological insulator (SOTI) in d spatial dimensions features topologically protected gapless states at its (d-2)-dimensional boundary at the intersection of two crystal faces, but is gapped otherwise. As a novel topological state, it has been attracting great interest, but it remains a challenge to identify a realistic SOTI material in two dimensions (2D). Here, based on combined first-principles calculations and theoretical analysis, we reveal the already experimentally synthesized 2D material graphdiyne as the first realistic example of a 2D SOTI, with topologically protected 0D corner states. The role of crystalline symmetry, the robustness against symmetry breaking, and the possible experimental characterization are discussed. Our results uncover a hidden topological character of graphdiyne and promote it as a concrete material platform for exploring the intriguing physics of higher-order topological phases.-
dc.languageeng-
dc.relation.ispartofPhysical Review Letters-
dc.titleTwo-Dimensional Second-Order Topological Insulator in Graphdiyne-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevLett.123.256402-
dc.identifier.pmid31922761-
dc.identifier.scopuseid_2-s2.0-85077238036-
dc.identifier.volume123-
dc.identifier.issue25-
dc.identifier.spagearticle no. 256402-
dc.identifier.epagearticle no. 256402-
dc.identifier.eissn1079-7114-
dc.identifier.isiWOS:000503245200014-

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