Effect of nonequilibrium phonons on the tunnel current in superlattices
โ Scribed by S.A. Cavill; A.V. Akimov; F.F. Ouali; L.J. Challis; A.J. Kent; M. Henini
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 84 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0749-6036
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โฆ Synopsis
We present the first measurements of the effect of nonequilibrium phonons on the tunnel current in a weakly coupled GaAs/AlAs superlattice. The phonon-induced current has a maximum at a bias voltage which varies linearly with phonon source temperature at both zero and applied magnetic fields (B = 6 T). We attribute these results to assisted tunnelling by stimulated phonon emission and show that this system can be used as a phonon spectrometer.
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