Confined electronic states and their modulations in graphene nanorings

被引：6

作者：

Zhu, Jia-Lin ^{[1
]}

Wang, Xingyuan ^{[1
]}

Yang, Ning ^{[2
]}

机构：

[1] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China

[2] Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 12期

关键词：

REFLECTION;

D O I：

10.1103/PhysRevB.86.125435

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Confined electronic states in quantum rings formed by spatially modulated finite Dirac gap (FDGQR) in graphene are systematically studied by series-expansion method, and are compared with those in infinite-mass-boundary and one-dimensional quantum rings. The shape-size effect of FDGQR is illustrated to be distinct from that in graphene quantum dots. The Aharonov-Bohm effect in FDGQR is clearly shown by the energy spectrum and the optical-transition probabilities. The FDGQR coupled with the electrostatic-potential induced nanoring is found useful for modulating the Dirac electronic states and the optical-transition probabilities. These results may help us to understand and to control the quantum behaviors of confined electronic states in graphene.

引用

页数：9