Journal
NANOTECHNOLOGY
Volume 29, Issue 31, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aac457
Keywords
vertical growth; Bi2Se3; thin film; weak antilocalization
Funding
- National Natural Science Foundation of China [51522104, 51331006]
- National Basic Research Program [2017YFA0206302]
- National Science Foundation [DMR-1151534]
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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.
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