Surface-energy engineered Bi-doped SnTe nanoribbons with weak antilocalization effect and linear magnetoresistance

Yi-Chao Zou; Zhi-Gang Chen; Fantai Kong; Enze Zhang; John Drennan; Kyeongjae Cho; Faxian Xiu; Jin Zou

doi:10.1039/c6nr07140f

Surface-energy engineered Bi-doped SnTe nanoribbons with weak antilocalization effect and linear magnetoresistance

Nanoscale. 2016 Nov 24;8(46):19383-19389. doi: 10.1039/c6nr07140f.

Authors

Yi-Chao Zou¹, Zhi-Gang Chen², Fantai Kong³, Enze Zhang⁴, John Drennan⁵, Kyeongjae Cho³, Faxian Xiu⁴, Jin Zou⁶

Affiliations

¹ Materials Engineering, University of Queensland, Brisbane, QLD 4072, Australia. j.zou@uq.edu.au zhigang.chen@uq.edu.au.
² Materials Engineering, University of Queensland, Brisbane, QLD 4072, Australia. j.zou@uq.edu.au zhigang.chen@uq.edu.au and Centre for Future Materials, University of Southern Queensland, Springfield, QLD 4300, Australia.
³ Department of Materials Science & Engineering, The University of Texas at Dallas, Richardson, TX 75080, USA.
⁴ Key Laboratory of Surface Physics and Department of Physics, and Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China.
⁵ Centre for Microscopy and Microanalysis, University of Queensland, Brisbane, QLD 4072, Australia.
⁶ Materials Engineering, University of Queensland, Brisbane, QLD 4072, Australia. j.zou@uq.edu.au zhigang.chen@uq.edu.au and Centre for Microscopy and Microanalysis, University of Queensland, Brisbane, QLD 4072, Australia.

PMID: 27845804
DOI: 10.1039/c6nr07140f

Abstract

The rational design of semiconductor nanocrystals with well-defined surfaces is a crucial step towards the realization of next-generation photodetectors, and thermoelectric and spintronic devices. SnTe nanocrystals, as an example, are particularly attractive as a type of topological crystalline insulator, where surface facets determine their surface states. However, most of the available SnTe nanocrystals are dominated by thermodynamically stable {100} facets, and it is challenging to grow uniform nanocrystals with {111} facets. In this study, guided by surface-energy calculations, we employ a chemical vapour deposition approach to fabricate Bi doped SnTe nanostructures, in which their surface facets are tuned by Bi doping. The obtained Bi doped SnTe nanoribbons with distinct {111} surfaces show a weak antilocalization effect and linear magnetoresistance under high magnetic fields, which demonstrate their great potential for future spintronic applications.