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Instability of the topological surface state in Bi2Se3 upon deposition of gold
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Number of Authors: 132017 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 95, no 18, article id 180202Article in journal (Refereed) Published
Abstract [en]

Momentum-resolved photoemission spectroscopy indicates the instability of the Dirac surface state upon deposition of gold on the (0001) surface of the topological insulator Bi2Se3. Based on the structure model derived from extended x-ray absorption fine structure experiments showing that gold atoms substitute bismuth atoms, first-principles calculations provide evidence that a gap appears due to hybridization of the surface state with gold d states near the Fermi level. Our findings provide insights into the mechanisms affecting the stability of the surface state.

Place, publisher, year, edition, pages
2017. Vol. 95, no 18, article id 180202
Keywords [en]
Band gap, Electronic structure of atoms & molecules, First-principles calculations, Topological materials
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-151033DOI: 10.1103/PhysRevB.95.180202ISI: 000417352700001OAI: oai:DiVA.org:su-151033DiVA, id: diva2:1172258
Available from: 2018-01-09 Created: 2018-01-09 Last updated: 2018-01-09Bibliographically approved

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Geilhufe, Matthias
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Nordic Institute for Theoretical Physics (Nordita)
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