resumo
A high quality Bi2Te3 crystal has been grown by Bridgman method with the use of rotating heat field. The phase purity and bulk structural quality of the crystal have been verified by XRD analysis and rocking curve observation. The atomically smooth Bi2Te3(0001) surface with an excellent crystallographic quality is formed by cleavage in the air. The chemical and microstructural properties of the surface have been evaluated with RHEED, AFM, STM, SE and XPS. The Bi2Te3(0001) cleaved surface is formed by atomically smooth terraces with the height of the elemental step of similar to 1.04 +/- 0.1 nm, as estimated by AFM. There is no surface oxidation process detected over a month keeping in the air at normal conditions, as shown by comparative core level photoelectron spectroscopy. (C) 2015 Published by Elsevier Inc.
palavras-chave
RAY PHOTOELECTRON-SPECTROSCOPY; BI2SE3 SINGLE-CRYSTALS; ROTATING HEAT FIELD; TOPOLOGICAL-INSULATOR; THERMOELECTRIC PROPERTIES; ELECTRONIC-STRUCTURE; DIRAC CONE; HYDROTHERMAL SYNTHESIS; OPTICAL-PROPERTIES; VAPOR-DEPOSITION
categoria
Chemistry
autores
Atuchin, VV; Golyashov, VA; Kokh, KA; Korolkov, IV; Kozhukhov, AS; Kruchinin, VN; Loshkarev, ID; Pokrovsky, LD; Prosvirin, IP; Romanyuk, KN; Tereshchenko, OE
nossos autores
Konstantin Nikolaevich Romanyuk
Investigador Júnioragradecimentos
This study is partly supported by the Russian Foundation for Basic Research (Grants 13-02-00706-a, 14-08-3110). The partial support from the Saint Petersburg State University (Project 11.50.202.2015) is acknowledged. The studies were partly performed using the instrumental equipment of CCU