Persistence of the topological surface states in Bi2Se3 against Ag intercalation at room temperature

doi:10.1021/acs.jpcc.0c07462

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DOI Доступ к ресурсу на сайте издателя			10.1021/acs.jpcc.0c07462

#топологические изоляторы

#интеркаляция

#топологически нетривиальные поверхностные состояния

Title: Persistence of the topological surface states in Bi2Se3 against Ag intercalation at room temperature
Creator: Ye, Mao
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Kuroda, Kenta
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Otrokov, Mikhail M.
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Ryabishchenkova, Anastasiya G.
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Jiang, Qi
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Ernst, Arthur
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Chulkov, Evgueni V.
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Nakatake, Masashi
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Arita, Masashi
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Okuda, Taichi
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Matsushita, Tomohiro
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Tóth, László
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Daimon, Hiroshi
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Shimada, Kenya
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Ueda, Yoshifumi
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Kimura, Akio
Date: 2021
DOI: 10.1021/acs.jpcc.0c07462
Description: The electronic and atomic structures of topological insulator Bi2Se3, upon Ag atom deposition, have been investigated by combined experimental methods of scanning tunneling microscopy (STM), photoelectron spectroscopy, and first-principles calculations. We show from the results of STM that the deposited Ag atoms are stabilized beneath the surface instead of being adsorbed on the topmost surface. We further reveal from the angle-resolved photoemission spectroscopy that the Bi2Se3(0001) topological surface states stay uninterrupted after a large amount of absorption of Ag atoms. Our analysis of the photoelectron intensity of Ag core states excited by soft X-ray suggests that a large amount of deposited Ag atoms diffused into a deeper place, which is beyond the probing depth of X-ray photoelectron spectroscopy. The first-principles calculations identify the octahedral site in the van der Waals gaps between quintuple layers to be the most favorable locations of Ag atoms beneath the surface, which yields good agreement between the simulated and experimental STM images. These findings pave an efficient way to tailor the local lattice structures of topological insulators without disturbing the topologically nontrivial surface states.

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collection(s): Научное управление
Identifier: смотреть в электронном каталоге НБ ТГУ
Type: статьи в журналах
Source: The Journal of Physical Chemistry C. 2021. Vol. 125, № 3. P. 1784-1792
Language: eng

Created: 13-04-2022

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Научное управление Persistence of the topological surface states in Bi2Se3 against Ag intercalation at room temperature