Issue
EPL
Volume 79, Number 5, September 2007
Article Number 57001
Number of page(s) 5
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/79/57001
Published online 25 July 2007
EPL, 79 (2007) 57001
DOI: 10.1209/0295-5075/79/57001

Landau quantization and curvature effects in a two-dimensional quantum dot

C. Furtado1, A. Rosas1 and S. Azevedo2

1  Departamento de Física, Universidade Federal da Paraíba - Caixa Postal 5008, 58059-900, João Pessoa, PB, Brazil
2  Departamento de Física, Universidade Estadual de Feira de Santana - 44031-460, Feira de Santana, BA, Brazil


received 6 March 2007; accepted in final form 5 July 2007; published September 2007
published online 25 July 2007

Abstract
In this work we have investigated the influence of topology in quantum dynamics in two-dimensional quantum dots in a conic surface. We analyze the quantum dynamics of particles in this dot when submitted to an external magnetic field and Aharonov-Bohm flux in the dot center. We obtain the eigenvalues and eigenfunctions exactly. We investigated the influence of geometry and topology on the magnetization, the Fermi energy, and the persistent currents. It is shown that the curvature of the space changes the oscillation pattern of those physical quantities.

PACS
73.20.At - Surface states, band structure, electron density of states.
73.23.Ra - Persistent currents.
72.15.Lh - Relaxation times and mean free paths.

© Europhysics Letters Association 2007