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Optically detected nuclear magnetic resonance of spatially selected lattice nuclei within a GaAs quantum well

Optically detected nuclear magnetic resonance of spatially selected lattice nuclei within a GaAs quantum well
Optically detected nuclear magnetic resonance of spatially selected lattice nuclei within a GaAs quantum well
The spectra of nuclear resonances provide a powerful microscopic probe of condensed matter, yet nuclear magnetic resonance (NMR) techniques have not so far been used to study semiconductor heterostructures. That is because only a tiny fraction of all the nuclei lie In the region of Interest, and conventional NMR cannot distinguish these. We report the first observation of optically detected NMR (ODNMR) of spatially selected nuclei In a semiconductor quantum well using an optical pumping technique which has the sensitivity and selectivity to overcome the limitations of conventional NMR. The sample is a 200 Angstrom thick single quantum well made p-type by applied electrical bias with a degenerate hole population of 1011 cm-2. The spectrum contains resonances corresponding to the three isotopes which make up the lattice: 69Ga, 71Ga, and 75As. It differs strikingly from that reported for bulk GaAs in that there is a 60(7)-kHz quadrupole splitting of the 75As resonance, shown In Fig. 1, which we attribute to the residual strain present in the GaAs layer.
Flinn, G.P.
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Harley, R.T.
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Snelling, M.J.
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Tropper, A.C.
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Kerr, T.M.
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Flinn, G.P.
a4fa86b9-2ba7-4d33-a75a-dc851166b079
Harley, R.T.
54613031-f60f-45f4-9b20-e49bcfd53b77
Snelling, M.J.
52851363-73f3-4934-a44b-77ae5f54b16a
Tropper, A.C.
f3505426-e0d5-4e91-aed3-aecdb44b393c
Kerr, T.M.
64f7681c-d5ab-42d2-84ba-c7e52e1f9767

Flinn, G.P., Harley, R.T., Snelling, M.J., Tropper, A.C. and Kerr, T.M. (1989) Optically detected nuclear magnetic resonance of spatially selected lattice nuclei within a GaAs quantum well. Conference on Lasers and Electro-Optics (CLEO '890, United States. 27 - 30 Apr 1989.

Record type: Conference or Workshop Item (Paper)

Abstract

The spectra of nuclear resonances provide a powerful microscopic probe of condensed matter, yet nuclear magnetic resonance (NMR) techniques have not so far been used to study semiconductor heterostructures. That is because only a tiny fraction of all the nuclei lie In the region of Interest, and conventional NMR cannot distinguish these. We report the first observation of optically detected NMR (ODNMR) of spatially selected nuclei In a semiconductor quantum well using an optical pumping technique which has the sensitivity and selectivity to overcome the limitations of conventional NMR. The sample is a 200 Angstrom thick single quantum well made p-type by applied electrical bias with a degenerate hole population of 1011 cm-2. The spectrum contains resonances corresponding to the three isotopes which make up the lattice: 69Ga, 71Ga, and 75As. It differs strikingly from that reported for bulk GaAs in that there is a 60(7)-kHz quadrupole splitting of the 75As resonance, shown In Fig. 1, which we attribute to the residual strain present in the GaAs layer.

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Published date: 1989
Venue - Dates: Conference on Lasers and Electro-Optics (CLEO '890, United States, 1989-04-27 - 1989-04-30

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Local EPrints ID: 77563
URI: http://eprints.soton.ac.uk/id/eprint/77563
PURE UUID: 921dc565-00cc-4af3-8793-1277b8d45479

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Date deposited: 11 Mar 2010
Last modified: 08 Apr 2020 16:40

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Contributors

Author: G.P. Flinn
Author: R.T. Harley
Author: M.J. Snelling
Author: A.C. Tropper
Author: T.M. Kerr

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