Lee, Milim Cho, Seong Won Yi, Yeonjin Lee, Suyoun 2024-01-19T19:04:39Z 2024-01-19T19:04:39Z 2021-09-05 2019-09-05 0925-8388 https://pubs.kist.re.kr/handle/201004/119586 Due to strong spin-orbit coupling (SOC), topological insulators (TIs) have attracted much interest in developing novel energy-efficient electronic devices. (Bi1-xSbx)(2)(Te1-ySey)(3) (BSTS) has been regarded as a prototypical TI because of the dominance of the surface channel in carrier transport. Nevertheless, the effect of the composition of BSTS on SOC has not been explored, which is important for the application in novel electronic devices. In this work, BSTS thin films with systematically varying compositions are examined to release composition-dependent maps for the bulk carrier density, the dominance of the surface states in carrier transport, and the strength of SOC. The maps show that the regions for optimizing each property are located in separate positions, with a narrow overlap between them. These results imply that a stringent control in composition of the BSTS thin film is required in order to take advantage of the spin-momentum-locked surface channel of TI in novel electronic devices. (C) 2019 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA SPIN-ORBIT INTERACTION QUANTUM COMPUTATION BAND-STRUCTURE MAGNETORESISTANCE TRANSPORT Composition-dependent topological-insulator properties of epitaxial (Bi1-xSbx)(2)(Te1-ySey)(3) thin films Article 10.1016/j.jallcom.2019.05.351 1 JOURNAL OF ALLOYS AND COMPOUNDS, v.800, pp.81 - 87 JOURNAL OF ALLOYS AND COMPOUNDS 800 81 87 scie scopus 000472711600012 2-s2.0-85066983877 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Chemistry Materials Science Metallurgy & Metallurgical Engineering Article SPIN-ORBIT INTERACTION QUANTUM COMPUTATION BAND-STRUCTURE MAGNETORESISTANCE TRANSPORT Topological insulator (Bi1-xSbx)(2)(Te1-ySey)(3) Spin-orbit coupling Suppression of bulk conductivity