Photoluminescence studies of modulation doped coupled double quantum wells in magnetic fields

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We have studied the photoluminescence spectra of a series of mudulation doped couple double quantum well structures in parallel and perpendicular magnetic fields to 62 tesla at 4K and 77K, for B{parallel}a, the spectra display distinct Landau level transitions which show anti-crossing with the e1-hh1 exciton. At high fields, the lowest conduction band-valence exciton approaches the extrapolated 0- 0 Landau level. About 25 Tesla, there is valence band mixing of the e1-lh1, e1-hh2, e1-hh1 transitions. The spectral peaks display a diamagnetic shift in low in-plane magnetic fields which become linear in high fields. At magnetic fields beyond 40T, spin splitting ... continued below

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5 p.

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Kim, Y.; Perry, C.H.; Simmons, J.A.; Klem, J.F.; Jones, E.D. & Rickel, D.G. September 1, 1996.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

We have studied the photoluminescence spectra of a series of mudulation doped couple double quantum well structures in parallel and perpendicular magnetic fields to 62 tesla at 4K and 77K, for B{parallel}a, the spectra display distinct Landau level transitions which show anti-crossing with the e1-hh1 exciton. At high fields, the lowest conduction band-valence exciton approaches the extrapolated 0- 0 Landau level. About 25 Tesla, there is valence band mixing of the e1-lh1, e1-hh2, e1-hh1 transitions. The spectral peaks display a diamagnetic shift in low in-plane magnetic fields which become linear in high fields. At magnetic fields beyond 40T, spin splitting is observed for both B{parallel}z and B{perpendicular} geometries. The partial energy gap discovered in conductance measurements in in-plane fields was not conclusively observed using photoluminescence spectroscopy, although anomalies in the energy dependence of the lowest level with magnetic field were evident at similar field values.

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5 p.

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OSTI as DE96014068

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  • International conference on physics of semiconductors, Berlin (Germany), 21-26 Jul 1996

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  • Other: DE96014068
  • Report No.: SAND--96-1516C
  • Report No.: CONF-960781--3
  • Grant Number: AC04-94AL85000;AC04-76DP00789
  • Office of Scientific & Technical Information Report Number: 286174
  • Archival Resource Key: ark:/67531/metadc671146

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  • September 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Aug. 23, 2016, 3:13 p.m.

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Kim, Y.; Perry, C.H.; Simmons, J.A.; Klem, J.F.; Jones, E.D. & Rickel, D.G. Photoluminescence studies of modulation doped coupled double quantum wells in magnetic fields, article, September 1, 1996; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc671146/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.