Physical Vapor Deposition Features of Ultrathin Nanocrystals of Bi2(TexSe1- x)3

Dmitry S Yakovlev; Dmitry S Lvov; Olga V Emelyanova; Pave S Dzhumaev; Igor V Shchetinin; Olga V Skryabina; Sergey V Egorov; Valery V Ryazanov; Alexander A Golubov; Dimitri Roditchev; Vasily S Stolyarov

doi:10.1021/acs.jpclett.2c02664

Physical Vapor Deposition Features of Ultrathin Nanocrystals of Bi₂(Te_xSe_{1- x})₃

J Phys Chem Lett. 2022 Oct 6;13(39):9221-9231. doi: 10.1021/acs.jpclett.2c02664. Epub 2022 Sep 28.

Authors

Dmitry S Yakovlev^{1

2}, Dmitry S Lvov³, Olga V Emelyanova⁴, Pave S Dzhumaev⁴, Igor V Shchetinin⁵, Olga V Skryabina^{1

3

5}, Sergey V Egorov^{2

3}, Valery V Ryazanov^{2

3

5}, Alexander A Golubov⁶, Dimitri Roditchev⁷, Vasily S Stolyarov^{1

5

8}

Affiliations

¹ Center for Advanced Mesoscience and Nanotechnology, Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia.
² Russian Quantum Center, Skolkovo, Moscow Region 143025, Russia.
³ Institute of Solid State Physics RAS, Chernogolovka, Moscow Region 142432, Russia.
⁴ National Research Nuclear University MEPhI, Moscow 115409, Russia.
⁵ National University of Science and Technology MISIS, Moscow 119049, Russia.
⁶ Faculty of Science and Technology, MESA+ Institute of Nanotechnology, Enschede 7500 AE, The Netherlands.
⁷ Laboratoire de Physique et d'Étude des Matériaux (LPEM), UMR-8213, ESPCI Paris, PSL Research University, CNRS, Sorbonne Université, Paris 75005, France.
⁸ Dukhov Research Institute of Automatics (VNIIA), Moscow 127055, Russia.

PMID: 36170663
DOI: 10.1021/acs.jpclett.2c02664

Abstract

Structural and electronic properties of ultrathin nanocrystals of chalcogenide Bi₂(Te_x Se_1-x)₃ were studied. The nanocrystals were formed from the parent compound Bi₂Te₂Se on as-grown and thermally oxidized Si(100) substrates using Ar-assisted physical vapor deposition, resulting in well-faceted single crystals several quintuple layers thick and a few hundreds nanometers large. The chemical composition and structure of the nanocrystals were analyzed by energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, electron backscattering, and X-ray diffraction. The electron transport through nanocrystals connected to superconducting Nb electrodes demonstrated Josephson behavior, with the predominance of the topological channels [Stolyarov et al. Commun. Mater., 2020, 1, 38]. The present paper focuses on the effect of the growth conditions on the morphology, structural, and electronic properties of nanocrystals.