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VOLUME 71 (2000) | ISSUE 5 | PAGE 280
Current response of a superlattice irradiated by nonequilibrium phonons
PACS: 73.50.-h, 73.61.-r
We studied a biased superlattice and found a considerable current response to irradiation by nonequilibrium acoustic phonons with effective temperature of the order of few Kelvins. We discussed two phonon source-superlattice configurations for which the current response is due to the interwell and intrawell electron transitions, respectively. We showed that the response is sensitive to both, direction and spectral distribution of the phonons. The results explain recent experiments on phonon-induced current responce and prove the possibility to use superlattices for characterization of high-frequency phonon flux.