TY - JOUR
T1 - Electronic structure of bilayer graphene
T2 - A real-space Green's function study
AU - Wang, Z. F.
AU - Li, Qunxiang
AU - Su, Haibin
AU - Wang, Xiaoping
AU - Shi, Q. W.
AU - Chen, Jie
AU - Yang, Jinlong
AU - Hou, J. G.
PY - 2007/2/14
Y1 - 2007/2/14
N2 - 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.
AB - 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.
UR - https://www.webofscience.com/wos/woscc/full-record/WOS:000244533800083
UR - https://openalex.org/W2114118504
UR - https://www.scopus.com/pages/publications/33847079653
U2 - 10.1103/PhysRevB.75.085424
DO - 10.1103/PhysRevB.75.085424
M3 - Journal Article
SN - 1098-0121
VL - 75
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 8
M1 - 085424
ER -