Epitaxial Growth of the BiySb2–yTe3–xSex 3D Topological Insulator: Physical Vapor Deposition and Molecular Beam Epitaxy | Sciact - CRIS-system of Boreskov Institute of Catalysis

Epitaxial Growth of the BiySb2–yTe3–xSex 3D Topological Insulator: Physical Vapor Deposition and Molecular Beam Epitaxy Full article

Journal

Crystal Growth and Design
ISSN: 1528-7483 , E-ISSN: 1528-7505

Output data

Year: 2022, Volume: 22, Number: 12, Pages: 7255-7263 Pages count : 9 DOI: 10.1021/acs.cgd.2c00906

Authors

Stepina Natalia P. ¹ , Ishchenko Denis V. ¹ , Golyashov Vladimir A. ^1,2 , Bazhenov Alexander O. ¹ , Goldyreva Ekaterina S. ³ , Akhundov Igor O. ¹ , Tarasov Andrey S. ¹ , Kokh Konstantin A. ^3,4 , Tereshchenko Oleg E. ^1,2

Affiliations

1	Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk 630090, Russia
2	Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, Kol’tsovo 630559, Russia
3	Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk 630090, Russia
4	Kemerovo State University, Kemerovo 650000, Russia

BiySb2–yTe3–xSex (BSTS) topological insulator (TI) thin films were grown by physical vapor deposition (PVD) and molecular-beam epitaxy (MBE) and compared by growth parameters, substrate selection, preparation, and resulting film properties. For the MBE-grown BSTS on Si(111)-(7 × 7), preliminary deposition of the Bi2Te3 buffer layer at the Te-rich growth condition was found to improve the film structural properties. Using a BSTS crystal as the main source for deposition allows us to significantly decrease the molecular Te flux. For the PVD growth, optimal conditions (gas flux, source, and substrate temperatures) were found for a morphologically smooth BSTS film on mica. In order to grow the epitaxial BSTS film on a Si/SiO2 substrate, graphene was successfully used as the pre-epitaxial layer. A newly developed chemical preparation method of atomically clean and structurally ordered epi-layer surfaces allowed us to study the electronic structure of the grown TI films without using capping layers. The surface states with Dirac-like dispersion at the Γ-point in the surface Brillouin zone were detected by angle-resolved photoelectron spectroscopy. Photoemission measurements showed a change in the surface Fermi level position depending on the composition of BSTS films. The magnetoconductivity data demonstrated a strong dependence of the parameters describing a weak antilocalization on the substrate used.

Stepina N.P. , Ishchenko D.V. , Golyashov V.A. , Bazhenov A.O. , Goldyreva E.S. , Akhundov I.O. , Tarasov A.S. , Kokh K.A. , Tereshchenko O.E.
Epitaxial Growth of the BiySb2–yTe3–xSex 3D Topological Insulator: Physical Vapor Deposition and Molecular Beam Epitaxy
Crystal Growth and Design. 2022. V.22. N12. P.7255-7263. DOI: 10.1021/acs.cgd.2c00906 WOS Scopus AN OpenAlex publication_identifier_short.sciact_skif_identifier_type

Submitted:	Aug 10, 2022
Accepted:	Oct 21, 2022
Published online:	Nov 2, 2022
Published print:	Dec 7, 2022

Web of science:	WOS:000884799900001
Scopus:	2-s2.0-85141682279
Chemical Abstracts:	2022:2777000
OpenAlex:	W4308483529
publication_identifier.sciact_skif_identifier_type:	1546

DB	Citing
OpenAlex	11
Web of science	11
Scopus	10