Crossover from 3D to 2D Quantum Transport in Bi2Se3/In2Se3 Superlattices

The topological insulator/normal insulator (TI/NI) superlattices (SLs) with multiple Dirac channels are predicted to offer great opportunity to design novel materials and investigate new quantum phenomena. Here, we report first transport studies on the SLs composed of TI Bi2Se3 layers sandwiched by...

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Published inNano letters Vol. 14; no. 9; pp. 5244 - 5249
Main Authors Zhao, Yanfei, Liu, Haiwen, Guo, Xin, Jiang, Ying, Sun, Yi, Wang, Huichao, Wang, Yong, Li, Han-Dong, Xie, Mao-Hai, Xie, Xin-Cheng, Wang, Jian
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 10.09.2014
Subjects
weak-antilocalization
topological insulators
weak-localization
transport dimensionality
superlattices
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Summary:The topological insulator/normal insulator (TI/NI) superlattices (SLs) with multiple Dirac channels are predicted to offer great opportunity to design novel materials and investigate new quantum phenomena. Here, we report first transport studies on the SLs composed of TI Bi2Se3 layers sandwiched by NI In2Se3 layers artificially grown by molecular beam epitaxy (MBE). The transport properties of two kinds of SL samples show convincing evidence that the transport dimensionality changes from three-dimensional (3D) to two-dimensional (2D) when decreasing the thickness of building block Bi2Se3 layers, corresponding to the crossover from coherent TI transport to separated TI channels. Our findings provide the possibility to realizing “3D surface states” in TI/NI SLs.
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ISSN:1530-6984
1530-6992
DOI:10.1021/nl502220p