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

被引：49

作者：

Zhao, Yanfei ^{[1
,2
]}

Liu, Haiwen ^{[1
,2
]}

Guo, Xin ^{[3
]}

Jiang, Ying ^{[4
]}

Sun, Yi ^{[1
,2
]}

Wang, Huichao ^{[1
,2
]}

Wang, Yong ^{[4
]}

Li, Han-Dong ^{[5
]}

Xie, Mao-Hai ^{[3
]}

Xie, Xin-Cheng ^{[1
,2
]}

Wang, Jian ^{[1
,2
]}

机构：

[1] Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China

[2] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

[3] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[4] Zhejiang Univ, Ctr Electron Microscopy, State Key Lab Silicon Mat, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

[5] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

来源：

NANO LETTERS | 2014年 / 14卷 / 09期

基金：

中国国家自然科学基金;

关键词：

topological insulators; superlattices; transport dimensionality; weak-localization; weak-antilocalization; TOPOLOGICAL INSULATOR BI2SE3; WEAK-LOCALIZATION; SURFACE CONDUCTION; MAGNETORESISTANCE; STATES;

D O I：

10.1021/nl502220p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：5244 / 5249

页数：6

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