TUNNELING FOR DIRAC FERMIONS IN CONSTANT MAGNETIC FIELD

被引：9

作者：

Choubabi, El Bouazzaoui ^{[1
,2
]}

El Bouziani, Mohamed ^{[1
]}

Jellal, Ahmed ^{[1
]}

机构：

[1] Chouaib Doukkali Univ, Fac Sci, Theoret Phys Grp, El Jadida 24000, Morocco

[2] King Faisal Univ, Coll Sci, Dept Phys, Alahsa 31982, Saudi Arabia

来源：

INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS | 2010年 / 7卷 / 06期

关键词：

Dirac fermions; graphene; tunneling effect; energy gap; scalar Lorentz potential; KLEIN PARADOX; GRAPHENE; PHYSICS;

D O I：

10.1142/S0219887810004622

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The tunneling effect of two-dimensional Dirac fermions in a constant magnetic field is studied. This can be done by using the continuity equation at some points to determine the corresponding reflexion and transmission coefficients. For this, we consider a system made of graphene as superposition of two different regions where the second is characterized by an energy gap t '. In fact, we treat concrete systems to practically give two illustrations: barrier and diode. For each case, we discuss the transmission in terms of the ratio of the energy conservation and t '. Moreover, we analyze the resonant tunneling by introducing a scalar Lorentz potential where it is shown that a total transmission is possible.

引用

页码：909 / 931

页数：23

共 18 条

[1] Klein paradox and resonant tunneling in a graphene superlattice [J].

Bai, Chunxu ;

Zhang, Xiangdong .

PHYSICAL REVIEW B, 2007, 76 (07)

[2]

Born M., 1997, Principles of Optics: Electromagnetic Theory of Propagation, Interference and Diffraction of Light

[3]

BRUCE HJ, 1987, PHYS REV C, V35, P2262

[4] History and physics of the Klein paradox [J].

Calogeracos, A ;

Dombey, N .

CONTEMPORARY PHYSICS, 1999, 40 (05) :313-321

[5] Magnetic confinement of massless Dirac fermions in graphene [J].

De Martino, A. ;

Dell'Anna, L. ;

Egger, R. .

PHYSICAL REVIEW LETTERS, 2007, 98 (06)

[6]

Giovannetti G, 2007, PHYS REV B, V76, DOI 10.1103/PhysRevB.76.073103

[7] Tunneling of Dirac electrons through spatial regions of finite mass [J].

Gomes, J. Viana ;

Peres, N. M. R. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2008, 20 (32)

[8]

ITZYKSON C, 1985, QUANTUM FIELD THEORY, pCH2

[9] Graphene: New bridge between condensed matter physics and quantum electrodynamics [J].

Katsnelson, M. I. ;

Novoselov, K. S. .

SOLID STATE COMMUNICATIONS, 2007, 143 (1-2) :3-13

[10] 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

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