The Effect of Non-Equilibrium Acoustic Phonons on the Tunnel Current in GaAs/AlAs Superlattices

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Turkish Journal of Physics
Volume:23 Issue:4
The Effect of Non-Equilibrium Acoustic Phonons on the Tunnel Current in GaAs/AlAs Superlattices

The Effect of Non-Equilibrium Acoustic Phonons on the Tunnel Current in GaAs/AlAs Superlattices

Authors : S A CAVILL, F F OUALI, L J CHALLIS, A J KENT, M HENINI

Pages : 745-750

View : 14 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :We present the first study of the effect of ballistic acoustic phonons generated by a heated metal film on the tunnel current in GaAs/AlAs superlattices. The phonon-induced increase of the tunnel current as a function of applied voltage has a maximum at a voltage that varies linearly with heater temperature both in zero and applied magnetic field. The behaviour is consistent with phonon-assisted tunnelling by stimulated phonon emission. The system acts as a phonon spectrometer in the < 1THz frequency region with a resolution of approximately 200 GHz.
Keywords : Turk J Phys, 23, 1999, 745 750 Turk J Phys, vol 23, iss 4

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