Topologization of β-antimonene on Bi2Se3 via proximity effects

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Holtgrewe K., Mahatha S., Sheverdyaeva P., Moras P., Flammini R., Colonna S., ...daha çox

Scientific Reports, vol.10, no.1, 2020 (SCI-Expanded, Scopus)

• Nəşrin Növü: Article / Article
• Cild: 10 Say: 1
• Nəşr tarixi: 2020
• Doi nömrəsi: 10.1038/s41598-020-71624-4
• jurnalın adı: Scientific Reports
• Jurnalın baxıldığı indekslər: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, CAB Abstracts, Chemical Abstracts Core, EMBASE, MEDLINE, Veterinary Science Database, Directory of Open Access Journals
• Açıq Arxiv Kolleksiyası: Məqalə
• Adres: Bəli

Qısa məlumat

Topological surface states usually emerge at the boundary between a topological and a conventional insulator. Their precise physical character and spatial localization depend on the complex interplay between the chemical, structural and electronic properties of the two insulators in contact. Using a lattice-matched heterointerface of single and double bilayers of β-antimonene and bismuth selenide, we perform a comprehensive experimental and theoretical study of the chiral surface states by means of microscopy and spectroscopic measurements complemented by first-principles calculations. We demonstrate that, although β-antimonene is a trivial insulator in its free-standing form, it inherits the unique symmetry-protected spin texture from the substrate via a proximity effect that induces outward migration of the topological state. This “topologization” of β-antimonene is found to be driven by the hybridization of the bands from either side of the interface.