Magnetoabsorption in InSb quantum-well heterostructures

被引：10
|
作者：
Orr, J. M. S. [1 ]
Chuang, K. -C. [1 ]
Nicholas, R. J. [1 ]
Buckle, L. [2 ]
Emeny, M. T. [2 ]
Buckle, P. D. [2 ]
机构：
[1] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England
[2] QinetiQ, Malvern WR13 3PS, Worcs, England
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 23期
关键词：
RESOLVED CYCLOTRON-RESONANCE; MAGNETO INFRARED-ABSORPTION; INTERSUBBAND TRANSITIONS; INVERSION LAYER; SELECTION-RULES; CONDUCTION-BAND; ELECTRON-GAS; SPECTROSCOPY; FIELDS;
D O I：
10.1103/PhysRevB.79.235302
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Spin-resolved cyclotron resonance is observed in InSb/AlInSb quantum-well heterostructures. Spin-resolved transitions are identified for fields greater than 2.2 T and confirmed by k.p modeling. The cyclotron effective mass is calculated for a range of fields up to 11.5 T and is indicative of the strong nonparabolicity in this material. Resonant coupling is observed between the ground and first occupied subbands for normal-incidence excitation. This is explained in the context of conduction band-valance band mixing due to the narrow band-gap. Further resonant coupling is observed via interaction with a hybrid intersubband plasmon-LO phonon mode. This allows a quantitative estimation of the subband spacing and of the electron-phonon interactions in the quantum well.
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页数：7
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