Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/25476
Title: Formation mechanism of bound states in graphene point contacts
Authors: Deng, HY
Wakabayashi, K
Lam, CH 
Issue Date: 2014
Publisher: American Physical Society
Source: Physical review. B, Condensed matter and materials physics, 2014, v. 89, no. 4, 45423 How to cite?
Journal: Physical review. B, Condensed matter and materials physics 
Abstract: Electronic localization in narrow graphene constrictions is theoretically studied, and it is found that long-lived (∼1 ns) quasibound states (QBSs) can exist in a class of ultrashort graphene quantum point contacts (QPCs). These QBSs are shown to originate from the dispersionless edge states that are characteristic of the electronic structure of generically terminated graphene, in which pseudo-time-reversal symmetry is broken. The QBSs can be regarded as interface states confined between two graphene samples, and their properties can be modified by changing the sizes of the QPC and the interface geometry. In the presence of bearded sites, these QBSs can be converted into bound states. Experimental consequences and potential applications are discussed.
URI: http://hdl.handle.net/10397/25476
ISSN: 1098-0121
EISSN: 1550-235X
DOI: 10.1103/PhysRevB.89.045423
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