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Title:
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Electronic structure of bilayer graphene : a real-space Green’s function study.
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Author:
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Wang, Z. F.; Li, Qunxiang.; Su, Haibin.; Wang, Xiaoping.; Shi, Q. W.; Chen, Jie.; Yang, Jinlong.; Hou, J. G.
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Copyright year:
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2007 |
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Abstract:
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In this paper, a real-space analytical expression for the free Green’s function (propagator) of bilayer
graphene is derived based on the effective-mass approximation. Green’s function displays highly spatial anisotropy
with threefold rotational symmetry. The calculated local density of states (LDOS) of a perfect bilayer
graphene produces the main features of the observed scanning tunneling microscopy (STM) images of graphite
at low bias voltage. Some predicted features of the LDOS can be verified by STM measurements. In addition,
we also calculate the LDOS of bilayer graphene with vacancies by using the multiple-scattering theory (scatterings
are localized around the vacancy of bilayer graphene). We observe that the interference patterns are
determined mainly by the intrinsic properties of the propagator and the symmetry of the vacancies. |
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Subject:
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DRNTU::Engineering::Materials::Nanostructured materials. |
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Type:
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Journal Article |
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Series/ Journal Title:
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Physical review B |
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School:
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School of Materials Science and Engineering |
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Rights:
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© 2007 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at: [DOI: http://dx.doi.org/10.1103/PhysRevB.75.085424]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. |
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Version:
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Published version |
