期刊
APPLIED PHYSICS LETTERS
卷 102, 期 17, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.4803010
关键词
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资金
- Ministry of Education, Science, Sports and Culture [22740196]
- Grants-in-Aid for Scientific Research [22740196] Funding Source: KAKEN
Silicene is a quantum spin-Hall insulator, which undergoes a topological phase transition into other insulators by applying external fields. We investigate transport properties of silicene nanoribbons based on the Landauer formalism. We propose to determine topological phase transitions by measuring the density of states and conductance. The conductance is quantized and changes its value when the system transforms into different phases. We show that a silicene nanoribbon near the zero energy acts as a field-effect transistor. This transistor is robust since the zero-energy edge states are topologically protected. Our findings open a way to future topological quantum devices. (C) 2013 AIP Publishing LLC.
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