Scattering in gapped graphene quantum dot with magnetic flux

被引：1

作者：

Lemaalem, Bouchaib ^{[1
]}

Belouad, Abdelhadi ^{[1
]}

Mekkaoui, Miloud ^{[1
]}

Jellal, Ahmed ^{[1
,2
]}

机构：

[1] Chouaib Doukkali Univ, Lab Theoret Phys, Fac Sci, POB 20, El Jadida 24000, Morocco

[2] Canadian Quantum Res Ctr, 204-3002 32 Ave, Vernon, BC V1T 2L7, Canada

来源：

PHYSICA SCRIPTA | 2020年 / 95卷 / 10期

关键词：

Graphene; Circular quantum dot; Energy gap; Magnetic flux; Scattering;

D O I：

10.1088/1402-4896/abb632

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the propagation of electrons in a circular quantum dot of gapped graphene subject to the magnetic flux. We present analytical expressions for the eigenstates, scattering coefficients, scattering efficiency and radial component of the reflected current. We identify different scattering regimes as a function of the physical parameters such as the incident electronic energy, potential barrier, radius of quantum dot, gap and. We choose two values of the flux = 1/2, 3/2 and show that for low energy of the incident electron, the scattering resonances appear and the far-field scattered current presents distinct preferred scattering directions.

引用

页数：10

共 30 条

[1] Rashba spin-orbit interaction and birefringent electron optics in graphene [J].

Asmar, Mahmoud M. ;

Ulloa, Sergio E. .

PHYSICAL REVIEW B, 2013, 87 (07)

[2] Electrostatic Confinement of Electrons in an Integrable Graphene Quantum Dot [J].

Bardarson, J. H. ;

Titov, M. ;

Brouwer, P. W. .

PHYSICAL REVIEW LETTERS, 2009, 102 (22)

[3] Electron scattering in gapped graphene quantum dots [J].

Belouad, Abdelhadi ;

Zahidi, Youness ;

Jellal, Ahmed ;

Bahlouli, Hocine .

EPL, 2018, 123 (02)

[4] The electronic properties of graphene [J].

Castro Neto, A. H. ;

Guinea, F. ;

Peres, N. M. R. ;

Novoselov, K. S. ;

Geim, A. K. .

REVIEWS OF MODERN PHYSICS, 2009, 81 (01) :109-162

[5] Caustics due to a negative refractive index in circular graphene p-n junctions [J].

Cserti, Jozsef ;

Palyi, Andras ;

Peterfalvi, Csaba .

PHYSICAL REVIEW LETTERS, 2007, 99 (24)

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

De Martino, A. ;

Dell'Anna, L. ;

Egger, R. .

PHYSICAL REVIEW LETTERS, 2007, 98 (06)

[7] Electron confinement in graphene with gate-defined quantum dots [J].

Fehske, Holger ;

Hager, Georg ;

Pieper, Andreas .

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2015, 252 (08) :1868-1871

[8] The rise of graphene [J].

Geim, A. K. ;

Novoselov, K. S. .

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

[9] Graphene: Status and Prospects [J].

Geim, A. K. .

SCIENCE, 2009, 324 (5934) :1530-1534

[10] Electronic and optical properties of a circular graphene quantum dot in a magnetic field: Influence of the boundary conditions [J].

Grujic, M. ;

Zarenia, M. ;

Chaves, A. ;

Tadic, M. ;

Farias, G. A. ;

Peeters, F. M. .

PHYSICAL REVIEW B, 2011, 84 (20)

← 1 2 3 →