Transport Properties of Graphene Nanoroads in Boron Nitride Sheets
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- 作者：Jeil Jung ; Zhenhua Qiao ; Qian Niu ; Allan H. MacDonald
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：June 13, 2012
- 年：2012
- 卷：12
- 期：6
- 页码：2936-2940
- 全文大小：385K
- 年卷期：v.12,no.6(June 13, 2012)
- ISSN：1530-6992
文摘
We demonstrate that the one-dimensional (1D) transport channels that appear in the gap when graphene nanoroads are embedded in boron nitride (BN) sheets are more robust when they are inserted at AB/BA grain boundaries. Our conclusions are based on ab initio electronic structure calculations for a variety of different crystal orientations and bonding arrangements at the BN/C interfaces. This property is related to the valley Hall conductivity present in the BN band structure and to the topologically protected kink states that appear in continuum Dirac models with position-dependent masses.