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Moura, F. A. B. F., de and Lyra, M. L. and Domínguez-Adame Acosta, Francisco and Malyshev, Andrey (2007) Coherent electron dynamics in a two-dimensional random system with mobility edges. Journal of physics: condensed matter, 19 (5). ISSN 0953-8984
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Official URL: http://dx.doi.org/10.1088/0953-8984/19/5/056204
Abstract
We study numerically the dynamics of a one-electron wavepacket in a two-dimensional random lattice with long-range correlated diagonal disorder in the presence of a uniform electric field. The time-dependent Schrodinger equation is used for this purpose. We find that the wavepacket displays Bloch-like oscillations associated with the appearance of a phase of delocalized states in the strong correlation regime. The amplitude of oscillations directly reflects the bandwidth of the phase and allows us to measure it. The oscillations reveal two main frequencies whose values are determined by the structure of the underlying potential in the vicinity of the wavepacket maximum.
Item Type: | Article |
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Additional Information: | © Copyright IOP Publishing. |
Uncontrolled Keywords: | Range correlated disorder; Random-dimer model; Metal-insulator-transition; Anderson model; Conducting polymers; Diagonal disorder; Localization; Delocalization; Absence; Diffusion |
Subjects: | Sciences > Physics > Materials |
ID Code: | 37888 |
Deposited On: | 25 May 2016 17:02 |
Last Modified: | 25 May 2016 17:02 |
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