Power-law singularity in the local density of states due to the point defect in graphene

Authors

Wen-Min Huang
Jian-Ming Tang, University of New Hampshire
Hsiu-Hau Lin

Abstract

Defects in graphene give rise to zero modes that are often related to the sharp peak in the local density of states near the defect site. Here we solved all zero modes induced by a single defect in the finite-size graphene and show that their contributions to the local density of states vanish in the thermodynamic limit. Instead, lots of resonant states emerge at low energies and eventually lead to a power-law singularity in the local density of states. Our findings show that the impurity problem in graphene should be treated as a collective phenomenon rather than a single impurity state.

Department

Physics

Publication Date

9-17-2009

Journal Title

Physical Review B

Publisher

AMERICAN PHYSICAL SOC

Digital Object Identifier (DOI)

10.1103/PhysRevB.80.121404

Document Type

Article

Recommended Citation

Huang, Wen-Min; Tang, Jian-Ming; and Lin, Hsiu-Hau, "Power-law singularity in the local density of states due to the point defect in graphene" (2009). Physical Review B. 108.
https://scholars.unh.edu/physics_facpub/108

Rights

© 2009 The American Physical Society