Effect of electron-electron interactions on the Klein paradox in graphene-based double-barrier structures

被引：27

作者：

Bai, Chunxu ^{[1
]}

Yang, Yanling ^{[1
]}

Zhang, Xiangdong ^{[1
]}

机构：

[1] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 23期

关键词：

electrical conductivity; electron spin polarisation; graphene; Green's function methods; HF calculations; shot noise; REFLECTION; DYNAMICS; FILMS;

D O I：

10.1103/PhysRevB.80.235423

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of Coulomb interactions on the transport properties of the relativistic electron through graphene-based double-barrier structures have been investigated. A self-consistent Green's function method has been developed by solving numerically the Dyson equation in the Hartree-Fock approximation. The transmission probability, conductivity, shot noise, and Fano factor through the structures have been calculated and analyzed. It is shown that Klein tunneling is suppressed strongly by taking into account the electron-electron interaction. In contrast, the Fano factor shows abrupt increase. The shot noise is either improved or suppressed, which depends on the energy of the incident electron and the strength of the electron-electron interaction. The physical originations for these phenomena have been discussed.

引用

页数：6

共 40 条

[11]

Economou E.N., 1979, Green's Function in Quantum Physics

[12] Coulomb blockade in graphene nanodisks [J].

Ezawa, Motohiko .

PHYSICAL REVIEW B, 2008, 77 (15)

[13] The rise of graphene [J].

Geim, A. K. ;

Novoselov, K. S. .

NATURE MATERIALS, 2007, 6 (03) :183-191

[14] Quantum-optical input-output relations for dispersive and lossy multilayer dielectric plates [J].

Gruner, T ;

Welsch, DG .

PHYSICAL REVIEW A, 1996, 54 (02) :1661-1677

[15] Interactions and phase transitions on graphene's honeycomb lattice [J].

Herbut, Igor F. .

PHYSICAL REVIEW LETTERS, 2006, 97 (14)

[16] Coulomb interaction, ripples, and the minimal conductivity of graphene [J].

Herbut, Igor F. ;

Juricic, Vladimir ;

Vafek, Oskar .

PHYSICAL REVIEW LETTERS, 2008, 100 (04)

[17] Quasiparticle spectral function in doped graphene: Electron-electron interaction effects in ARPES [J].

Hwang, E. H. ;

Das Sarma, S. .

PHYSICAL REVIEW B, 2008, 77 (08)

[18] Chiral tunnelling and the Klein paradox in graphene [J].

Katsnelson, M. I. ;

Novoselov, K. S. ;

Geim, A. K. .

NATURE PHYSICS, 2006, 2 (09) :620-625

[19]

Katsnelson MI, 2006, EUR PHYS J B, V51, P157, DOI [10.1140/epjb/e2006-00203-1, 10.1140/epjb/e200S-00203-1]

[20] The reflection of electrons at a potential jump to the relative dynamics of Dirac [J].

Klein, O. .

ZEITSCHRIFT FUR PHYSIK, 1929, 53 (3-4) :157-165

← 1 2 3 4 →