Excitons in motion: universal dependence of the magnetic moment on kinetic energy

V P Kochereshko, Lowenna Smith, James Davies, R T Cox, A Platonov, Daniel Wolverson, H Boukari, H Mariette, J Cibert, M Wiater, T Wojtowicz, G Karczewski

Research output: Contribution to journalArticle

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Abstract

We have observed remarkable changes in the magnetic properties of excitons as they acquire kinetic energy. In particular, the Zeeman splittings and diamagnetic shifts of excitonic transitions when magnetic fields are applied along the growth direction of (001) wide quantum wells of CdTe, ZnSe, ZnTe and GaAs are found to to have a strong dependence on the translational wavevector Kz. The behaviour of the Zee-man splittings corresponds to enhancement of the magnetic moments of the excitons. This enhancement is particularly marked when their translational kinetic energy becomes comparable with the exciton Rydberg and can be described by what appears to be a universal function of Kz. A model for the behaviour is outlined which involves motionally-induced mixing between the 1S hydrogenic exciton ground state and excited nP states. The observations imply that there are significant changes in the structure of the exciton as its translational kinetic energy increases.
Original languageEnglish
Pages (from-to)1059-1063
Number of pages5
JournalPhysica Status Solidi B-Basic Solid State Physics
Volume245
Issue number6
DOIs
Publication statusPublished - Jun 2008

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Magnetic moments
Excitons
Kinetic energy
magnetic moments
kinetic energy
excitons
augmentation
Excited states
Ground state
Semiconductor quantum wells
Magnetic properties
LDS 751
quantum wells
Magnetic fields
magnetic properties
ground state
shift
magnetic fields
excitation

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Excitons in motion: universal dependence of the magnetic moment on kinetic energy. / Kochereshko, V P; Smith, Lowenna; Davies, James; Cox, R T; Platonov, A; Wolverson, Daniel; Boukari, H; Mariette, H; Cibert, J; Wiater, M; Wojtowicz, T; Karczewski, G.

In: Physica Status Solidi B-Basic Solid State Physics, Vol. 245, No. 6, 06.2008, p. 1059-1063.

Research output: Contribution to journalArticle

Kochereshko, VP, Smith, L, Davies, J, Cox, RT, Platonov, A, Wolverson, D, Boukari, H, Mariette, H, Cibert, J, Wiater, M, Wojtowicz, T & Karczewski, G 2008, 'Excitons in motion: universal dependence of the magnetic moment on kinetic energy', Physica Status Solidi B-Basic Solid State Physics, vol. 245, no. 6, pp. 1059-1063. https://doi.org/10.1002/pssb.200777614
Kochereshko, V P ; Smith, Lowenna ; Davies, James ; Cox, R T ; Platonov, A ; Wolverson, Daniel ; Boukari, H ; Mariette, H ; Cibert, J ; Wiater, M ; Wojtowicz, T ; Karczewski, G. / Excitons in motion: universal dependence of the magnetic moment on kinetic energy. In: Physica Status Solidi B-Basic Solid State Physics. 2008 ; Vol. 245, No. 6. pp. 1059-1063.
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AU - Wolverson, Daniel

AU - Boukari, H

AU - Mariette, H

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