The University of Southampton
University of Southampton Institutional Repository

Magnetic g-factor of electrons in GaAs/AlGaAs quantum wells

Snelling, M.J., Flinn, G.P., Plaut, A.S., Harley, R.T., Tropper, A.C., Eccleston, R. and Phillips, C.C. (1991) Magnetic g-factor of electrons in GaAs/AlGaAs quantum wells Physical Review B, 44, (20), pp. 11345-11352.

Record type: Article

Abstract

The magnitude and sign of the effective magnetic splitting factor g* for conduction electrons in GaAs/AlxGa(1-x)As quantum wells have been determined as a function of well width down to 5 nm. The experimental method is based on combined measurements of the decay time of photoluminescence and of the suppression of its circular polarization under polarized optical pumping in a magnetic field perpendicular to the growth axis (Hanle effect). Measurements as a function of hole sheet density in the wells reveal a transition from excitonic behavior with very small apparent g value for low density, to larger absolute values characteristic of free electrons at higher densities. For 20-nm wells g* for electrons is close to the bulk value (-0.44), and increases for narrower wells passing through zero for well width close to 5.5 nm. A theoretical analysis based on three-band k.p theory, including allowance for conduction-band nonparabolicity and for wave-function penetration into the barriers, gives a reasonable representation of the data, leading to the conclusion that g* in quantum wells has a value close to that of electrons in the bulk at the confinement energy above the band minimum.

Full text not available from this repository.

More information

Published date: 1991

Identifiers

Local EPrints ID: 78552
URI: http://eprints.soton.ac.uk/id/eprint/78552
ISSN: 1550-235X
PURE UUID: 922394f9-7c18-4ebe-aba3-41c5a6e998dc

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:23

Export record

Contributors

Author: M.J. Snelling
Author: G.P. Flinn
Author: A.S. Plaut
Author: R.T. Harley
Author: A.C. Tropper
Author: R. Eccleston
Author: C.C. Phillips

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×