Negative photoconductivity in modulation-doped quantum wells
✍ Scribed by R.A. Höpfel; S. Juen; J. Shah; A.C. Gossard
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 332 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0749-6036
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📜 SIMILAR VOLUMES
The binding energies and Bohr radii for excitons involving electrons in excited subbands and heavy and light holes in modulation-doped quantum wells are studied. It is found that under an applied magnetic field the magneto-exciton binding energies increase much more rapidly than in the undoped well.
We report on magnetoresistance measurements of two-dimensional electrons in AlAs quantum wells with mobilities up to 19 m 2 =V s. Fractional quantum Hall states at ÿrst-and second-order ÿlling factors, and up to = 11 3 , are observed. Shubnikovde Haas oscillations of high-density samples reveal that