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题名: High-field cyclotron resonance and electron-phonon interaction in modulation-doped multiple quantum well structures
作者: Wang YJ;  Jiang ZX;  McCombe BD;  Peeters FM;  Wu XG;  Hai GQ;  Eustis TJ;  Schaff W
出版日期: 1998
会议日期: AUG 10-14, 1998
摘要: A systematic study of electron cyclotron resonance (CR) in two sets of GaAs/Al0.3Ga0.7As modulation-doped quantum-well samples (well widths between 12 and 24 nm) has been carried out in magnetic fields up to 30 T. Polaron CR is the dominant transition in the region of GaAs optical phonons for the set of lightly doped samples, and the results are in good agreement with calculations that include the interaction with interface optical phonons. The results from the heavily doped set are markedly different. At low magnetic fields (below the GaAs reststrahlen region), all three samples exhibit almost identical CR which shows little effect of the polaron interaction due to screening and Pauli-principle effects. Above the GaAs LO-phonon region (B > similar to 23 T), the three samples behave very differently. For the most lightly doped sample (3 x 10(11) cm(-2)) only one transition minimum is observed, which can be explained as screened polaron CR. A sample of intermediate density (6 x 10(11) cm(-2)) shows two lines above 23 T; the higher frequency branch is indistinguishable from the positions of the single line of the low density sample. For the most heavily, doped sample (1.2 x 10(12) cm(-2)) there is no evidence of high frequency resonance, and the strong, single line observed is indistinguishable from the lower branch observed from sample with intermediate doping density. We suggest that the low frequency branch in our experiment is a magnetoplasmon resonance red-shifted by disorder, and the upper branch is single-particle-like screened polaron CR. (C) 1998 Elsevier Science B.V. All rights reserved.
会议名称: 13th International Conference on High Magnetic Fields in Semiconductor Physics
KOS主题词: Cyclotron resonance;  Electron-phonon interaction;  Gallium arsenide;  Heterostructures;  Gases;  Limit;  Heterojunctions;  Polarons;  Modes;  Level
会议文集: PHYSICA B-CONDENSED MATTER, 256
专题: 中国科学院半导体研究所(2009年前)_会议论文

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推荐引用方式:
Wang YJ; Jiang ZX; McCombe BD; Peeters FM; Wu XG; Hai GQ; Eustis TJ; Schaff W .High-field cyclotron resonance and electron-phonon interaction in modulation-doped multiple quantum well structures .见:ELSEVIER SCIENCE BV .PHYSICA B-CONDENSED MATTER, 256,PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS ,1998,292-299
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