Issue |
Europhys. Lett.
Volume 66, Number 4, May 2004
|
|
---|---|---|
Page(s) | 585 - 591 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2003-10238-4 | |
Published online | 01 May 2004 |
Delocalization and ballistic dynamics in the two-dimensional Anderson model with long-range correlated disorder
1
Laboratório de Física Teórica e Computacional, Departamento de Física Universidade Federal de Pernambuco - 50670-901 Recife, PE, Brazil
2
Departamento de Física, Universidade Federal de Alagoas Maceió AL 57072-970, Brazil
Received:
18
November
2003
Accepted:
17
March
2004
We study the nature of one-electron eigenstates in a
two-dimensional () Anderson model with long-range correlated
disorder. Long-range correlations are introduced by using a
discrete Fourier method which generates an appropriated disorder
distribution with spectral density
. Our numerical data suggest that the exponents
governing the collapse of the participation function for low
energies (
) and the long time decay of the
autocorrelation function (
) satisfy the
scaling relation
. They also imply that the system
exhibits a crossover from a diffusive spread for weakly
correlated disorder to a ballistic dynamics associated with the
emergence of extended states in the strongly correlated disorder
regime
.
PACS: 78.30.Ly – Disordered solids / 71.30.+h – Metal-insulator transitions and other electronic transitions / 73.20.Jc – Delocalization processes
© EDP Sciences, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.