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

[21] Electron-electron interactions in the vacuum polarization of graphene [J].

Kotov, Valeri N. ;

Uchoa, Bruno ;

Castro Neto, A. H. .

PHYSICAL REVIEW B, 2008, 78 (03)

[22] Polarization charge distribution in gapped graphene: Perturbation theory and exact diagonalization analysis [J].

Kotov, Valeri N. ;

Pereira, Vitor M. ;

Uchoa, Bruno .

PHYSICAL REVIEW B, 2008, 78 (07)

[23] Effect of electron-electron interactions on the conductivity of clean graphene [J].

Mishchenko, E. G. .

PHYSICAL REVIEW LETTERS, 2007, 98 (21)

[24] Electric field effect in atomically thin carbon films [J].

Novoselov, KS ;

Geim, AK ;

Morozov, SV ;

Jiang, D ;

Zhang, Y ;

Dubonos, SV ;

Grigorieva, IV ;

Firsov, AA .

SCIENCE, 2004, 306 (5696) :666-669

[25] Graphene-based resonant-tunneling structures [J].

Pereira, J. Milton, Jr. ;

Vasilopoulos, P. ;

Peeters, F. M. .

APPLIED PHYSICS LETTERS, 2007, 90 (13)

[26] Plasmons and the spectral function of graphene [J].

Polini, Marco ;

Asgari, Reza ;

Borghi, Giovanni ;

Barlas, Yafis ;

Pereg-Barnea, T. ;

MacDonald, A. H. .

PHYSICAL REVIEW B, 2008, 77 (08)

[27] Effect of electron-electron interaction on the Fermi surface topology of doped graphene [J].

Roldan, R. ;

Lopez-Sancho, M. P. ;

Guinea, F. .

PHYSICAL REVIEW B, 2008, 77 (11)

[28] Zitterbewegung of nearly-free and tightly-bound electrons in semiconductors [J].

Rusin, T. M. ;

Zawadzki, W. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2007, 19 (13)

[29]

Schrdinger E., 1930, Sitzungsber. Preuss. Akad. Wiss. Phys. Math. Kl, V24, P418

[30] Quantum dots in graphene [J].

Silvestrov, P. G. ;

Efetov, K. B. .

PHYSICAL REVIEW LETTERS, 2007, 98 (01)

← 1 2 3 4 →