Quantum lifetimes in antidot arrays

Citation
Kh. Yoo et al., Quantum lifetimes in antidot arrays, PHYSICA B, 284, 2000, pp. 1910-1911
Citations number
1
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
284
Year of publication
2000
Part
2
Pages
1910 - 1911
Database
ISI
SICI code
0921-4526(200007)284:<1910:QLIAA>2.0.ZU;2-P
Abstract
Magnetotransport in GaAs/Ga1-xAlxAs heterostructures with a square array of antidote has been investigated. Quantum lifetimes tau(q) are estimated fro m the amplitudes of Shubnikov-de Haas oscillations and two values of tau(q) are found at low and high magnetic fields. The critical field at which tau (q) changes corresponds to the magnetic field where the cyclotron diameter 2R(c) is almost equal to the effective constriction length L-c between two antidots. This suggests that the influence of scattering from antidots on t au(q) is different in the regions where 2R(c) > L-c and where 2R(c) < L-c. (C) 2000 Elsevier Science B.V. All rights reserved.