Effect of nonequilibrium phonons on the tunnel current in superlattices

Authors
Cavill, SA Akimov, AV Ouali, FF Challis, LJ Kent, AJ Henini, M
Citation
Sa. Cavill et al., Effect of nonequilibrium phonons on the tunnel current in superlattices, SUPERLATT M, 25(1-2), 1999, pp. 459-462
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SUPERLATTICES AND MICROSTRUCTURES
ISSN journal
07496036 → ACNP
Volume
25
Issue
1-2
Year of publication
1999
Pages
459 - 462
Database
ISI
SICI code
0749-6036(199901/02)25:1-2<459:EONPOT>2.0.ZU;2-V
Abstract
We present the first measurements of the effect of nonequilibrium phonons o n 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. (C ) 1999 Academic Press.