Research output: Contribution to journal › Article › peer-review
Study of temperature Green’s functions of graphene-like systems in a half-space. / D’yakonov, I. A.; Komarova, M. V.; Nalimov, M. Yu.
In: Theoretical and Mathematical Physics(Russian Federation), Vol. 190, No. 3, 01.03.2017, p. 366-377.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Study of temperature Green’s functions of graphene-like systems in a half-space
AU - D’yakonov, I. A.
AU - Komarova, M. V.
AU - Nalimov, M. Yu
PY - 2017/3/1
Y1 - 2017/3/1
N2 - We consider the formalism of temperature Green’s functions to study the electronic properties of a semiinfinite two-dimensional graphene lattice at a given temperature. Under most general assumptions about the graphene boundary structure, we calculate the propagator in the corresponding diagram technique. The obtained propagator survives limit transitions between physically different states of the system boundary, i.e., a zig-zag edge and a boundary condition in the “infinite mass” approximation, and also correctly describes the problem where the electron–hole symmetry is violated because of the presence of an external potential applied to the graphene boundary. We illustrate the use of the propagator, its analytic properties, and specific features of calculating with it in the example of determining the dependence of the electron density on the distance to the system boundary.
AB - We consider the formalism of temperature Green’s functions to study the electronic properties of a semiinfinite two-dimensional graphene lattice at a given temperature. Under most general assumptions about the graphene boundary structure, we calculate the propagator in the corresponding diagram technique. The obtained propagator survives limit transitions between physically different states of the system boundary, i.e., a zig-zag edge and a boundary condition in the “infinite mass” approximation, and also correctly describes the problem where the electron–hole symmetry is violated because of the presence of an external potential applied to the graphene boundary. We illustrate the use of the propagator, its analytic properties, and specific features of calculating with it in the example of determining the dependence of the electron density on the distance to the system boundary.
KW - boundary condition
KW - graphene
KW - quantum field perturbation theory
KW - temperature Green’s function
UR - http://www.scopus.com/inward/record.url?scp=85016745013&partnerID=8YFLogxK
U2 - 10.1134/S0040577917030060
DO - 10.1134/S0040577917030060
M3 - Article
AN - SCOPUS:85016745013
VL - 190
SP - 366
EP - 377
JO - Theoretical and Mathematical Physics (Russian Federation)
JF - Theoretical and Mathematical Physics (Russian Federation)
SN - 0040-5779
IS - 3
ER -
ID: 37034666