Magnetoabsorption in InSb quantum-well heterostructures

Orr, J., Chuang, K.-C., Nicholas, R., Buckle, L., Emeny, M. and Buckle, Philip Derek ORCID: https://orcid.org/0000-0001-9508-7783 2009. Magnetoabsorption in InSb quantum-well heterostructures. Physical Review B 79 (23) , 235302. 10.1103/PhysRevB.79.235302

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Abstract

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 bandgap. 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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Additional Information:	9 pp.
Publisher:	American Physical Society
ISSN:	1098-0121
Last Modified:	20 May 2023 19:51
URI:	https://orca.cardiff.ac.uk/id/eprint/17451

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