Vacancy-induced splitting of the Dirac nodal point in graphene

W. Zhu, W. Li, Q. W. Shi, X. R. Wang, X. P. Wang, J. L. Yang, and J. G. Hou

Phys. Rev. B 85, 073407 – Published 27 February 2012

Abstract

We investigate the vacancy effects on quasiparticle band structure of graphene near the Dirac point. It is found that each Dirac nodal point splits into two new nodal points due to the coherent multiple scattering among vacancies. The energy split between the two nodal points is proportional to the square root of vacancy concentration. In addition, an extra dispersionless band is developed at zero energy. Our theory offers an excellent explanation to the recent experiments.

Received 7 February 2012

DOI:https://doi.org/10.1103/PhysRevB.85.073407

Authors & Affiliations

W. Zhu¹, W. Li^1,*, Q. W. Shi¹, X. R. Wang^2,3,†, X. P. Wang¹, J. L. Yang¹, and J. G. Hou¹

¹Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
²Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
³School of Physics, Wuhan University, Wuhan, People's Republic of China

^*wliustc@mail.ustc.edu.cn
^†phxwan@ust.hk

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Vol. 85, Iss. 7 — 15 February 2012

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