Growth and quantum transport properties of vertical Bi2 Se3 nanoplate films on Si substrates

Nanotechnology
Mingze LiZhidong Zhang

Abstract

Controlling the growth direction (planar versus vertical) and surface-to-bulk ratio can lead to lots of unique properties for two-dimensional layered materials. We report a simple method to fabricate continuous films of vertical Bi2Se3 nanoplates on Si substrate and investigate the quantum transport properties of such films. In contrast to (001) oriented planar Bi2Se3 nanoplate film, vertical Bi2Se3 nanoplate films are enclosed by (015) facets, which possess high surface-to-bulk ratio that can enhance the quantum transport property of topological surface states. And by controlling the compactness of vertical Bi2Se3 nanoplates, we realized an effective tuning of the weak antilocalization effect from topological surface states in Bi2Se3 films. Our work paves a way for exploring the unique transport properties of this unconventional structure topological insulator film.

References

Apr 7, 2010·Physical Review Letters·J G CheckelskyN P Ong
May 24, 2011·Physical Review Letters·Hong-Tao HeFu-Chun Zhang
Sep 26, 2012·Physical Review Letters·Namrata BansalSeongshik Oh
Feb 8, 2013·Nano Letters·Desheng KongYi Cui
May 3, 2014·Nano Letters·Jiong ZhaoMark H Rümmeli
Apr 30, 2015·Nano Letters·Sukrit SucharitakulXuan P A Gao
Jul 22, 2015·Physical Review Letters·Yi WangHyunsoo Yang
Jun 18, 2017·ACS Applied Materials & Interfaces·Biswajit DasKalyan K Chattopadhyay

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