High-field cyclotron resonance and electron-phonon interaction in modulation-doped multiple quantum well structures

SEMI OpenIR > 中国科学院半导体研究所（2009年前）

	High-field cyclotron resonance and electron-phonon interaction in modulation-doped multiple quantum well structures
	Wang YJ; Jiang ZX; McCombe BD; Peeters FM; Wu XG; Hai GQ; Eustis TJ; Schaff W; Wang YJ Florida State Univ Natl High Magnet Field Lab Tallahassee FL 32310 USA. 电子邮箱地址: wang@magnet.fsu.edu
	1998
会议名称	13th International Conference on High Magnetic Fields in Semiconductor Physics
会议录名称	PHYSICA B-CONDENSED MATTER, 256
页码	292-299
会议日期	AUG 10-14, 1998
会议地点	NIJMEGEN, NETHERLANDS
出版地	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
出版者	ELSEVIER SCIENCE BV
ISSN	0921-4526
部门归属	florida state univ, natl high magnet field lab, tallahassee, fl 32310 usa; suny buffalo, dept phys, buffalo, ny 14260 usa; univ instelling antwerp, dept phys, b-2610 wilrijk, belgium; chinese acad sci, inst semicond, natl lab superlattices & microstruct, beijing 100083, peoples r china; univ sao paulo, inst fis sao carlos, br-13560250 sao carlos, sp, brazil; cornell univ, dept elect engn, ithaca, ny 14853 usa
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.
关键词	Cyclotron Resonance Electron-phonon Interaction Electron-electron Interaction High Magnetic Fields Exchange Enhancement Gaas Heterostructures Gas Limit Heterojunctions Polarons Modes Level
学科领域	半导体物理
收录类别	CPCI-S
语种	英语
文献类型	会议论文
条目标识符	http://ir.semi.ac.cn/handle/172111/15059
专题	中国科学院半导体研究所（2009年前）
通讯作者	Wang YJ Florida State Univ Natl High Magnet Field Lab Tallahassee FL 32310 USA. 电子邮箱地址: wang@magnet.fsu.edu
推荐引用方式 GB/T 7714	Wang YJ,Jiang ZX,McCombe BD,et al. High-field cyclotron resonance and electron-phonon interaction in modulation-doped multiple quantum well structures[C]. PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS:ELSEVIER SCIENCE BV,1998:292-299.

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