Snake states in graphene quantum dots in the presence of a p-n junction

被引：16
|
作者：
Zarenia, M. [1 ]
Pereira, J. M., Jr. [2 ]
Peeters, F. M. [1 ,2 ]
Farias, G. A. [2 ]
机构：
[1] Univ Antwerp, Dept Phys, B-2020 Antwerp, Belgium
[2] Univ Fed Ceara, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil
来源：
PHYSICAL REVIEW B | 2013年 / 87卷 / 03期
关键词：
D O I：
10.1103/PhysRevB.87.035426
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate the magnetic interface states of graphene quantum dots that contain p-n junctions. Within a tight-binding approach, we consider rectangular quantum dots in the presence of a perpendicular magnetic field containing p-n as well as p-n-p and n-p-n junctions. The results show the interplay between the edge states associated with the zigzag terminations of the sample and the snake states that arise at the p-n junction due to the overlap between electron and hole states at the potential interface. Remarkable localized states are found at the crossing of the p-n junction with the zigzag edge having a dumb-bell-shaped electron distribution. The results are presented as a function of the junction parameters and the applied magnetic flux. DOI: 10.1103/PhysRevB.87.035426
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页数：12
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