Formation of Well-Ordered Surfaces of Bi2-xSbxTe3-ySey Topological Insulators Using Wet Chemical Treatment Научная публикация
Журнал |
Applied Surface Science
ISSN: 0169-4332 |
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Вых. Данные | Год: 2024, Том: 649, Номер статьи : 159122, Страниц : 9 DOI: 10.1016/j.apsusc.2023.159122 | ||||||||
Ключевые слова | Surface treatment; Topological insulator; Photoemission; Fermi level; Surface state | ||||||||
Авторы |
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Организации |
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Реферат:
The surface preparation of topological insulators (TIs) is a critical task in order to realize their efficient applications. A chemical treatment in an anhydrous solution of hydrogen chloride in isopropanol (HCl-iPA) and a subsequent annealing at relatively low temperature in ultrahigh vacuum (UHV) was successfully used for the surface preparation of bulk 3D (0 0 0 1) TIs Bi2Te3, Sb2Te3, Bi2Se3 and an MBE - grown Bi2-xSbxTe3-ySey (BSTS) thin films. The surface treatment showed a significant modification of the initial TI surfaces, which was free from the structural disorder, oxidation and chemical impurities determined by X-ray photoelectron spectroscopy and low-energy electron diffraction. The insulating nontrivial bulk gap and well resolved gapless surface states with a linear dispersion of a massless Dirac cone were observed by angle-resolved photoelectron spectroscopy (ARPES). In the BSTS film, the Fermi level is located within the bulk band gap. The negative magnetoconductance corresponding to weak antilocalization demonstrated the contribution of the surface states of BSTS, that promise to be protected from backscattering. The surface treatment method proposed in this work is highly efficient for both bulk and thin TI films that can be useful for the deposition of an insulators/metals to fabricate transistor and spin valve systems.
Библиографическая ссылка:
Tarasov A.S.
, Kumar N.
, Golyashov V.A.
, Akhundov I.O.
, Ishchenko D.V.
, Kokh K.A.
, Bazhenov A.O.
, Stepina N.P.
, Tereshchenko O.E.
Formation of Well-Ordered Surfaces of Bi2-xSbxTe3-ySey Topological Insulators Using Wet Chemical Treatment
Applied Surface Science. 2024. V.649. 159122 :1-9. DOI: 10.1016/j.apsusc.2023.159122 WOS Scopus РИНЦ CAPlus OpenAlex СКИФ ID
Formation of Well-Ordered Surfaces of Bi2-xSbxTe3-ySey Topological Insulators Using Wet Chemical Treatment
Applied Surface Science. 2024. V.649. 159122 :1-9. DOI: 10.1016/j.apsusc.2023.159122 WOS Scopus РИНЦ CAPlus OpenAlex СКИФ ID
Даты:
Поступила в редакцию: | 23 сент. 2023 г. |
Принята к публикации: | 11 нояб. 2023 г. |
Опубликована online: | 14 дек. 2023 г. |
Опубликована в печати: | 15 мар. 2024 г. |
Идентификаторы БД:
Web of science: | WOS:001140301600001 |
Scopus: | 2-s2.0-85181891616 |
РИНЦ: | 56442994 |
Chemical Abstracts: | 2023:2644307 |
OpenAlex: | W4389720319 |
СКИФ ID: | 1552 |