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VOLUME 86 | ISSUE 8 | PAGE 616
Microwave induced magnetoresistance oscillations at the subharmonics of the cyclotron resonance
S. I. Dorozhkin, J. H. Smet+, K. von Klitzing+, L. N. Pfeiffer*, K. W. West*
Institute of Solid State Physics, 142432 Chernogolovka, Moscow district, Russia
+ Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart, Germany
*Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974

PACS: 72.20.-i, 73.40.Kp
The magnetoresistance oscillations, which occur in a two-dimensional electron system exposed to strong microwave radiation when the microwave frequency ω coincides with the n-th subharmonic of the cyclotron frequency \omega_{\rm c}, have been investigated for n= 2,3 and 4. It is shown that these subharmonic features can be explained within a non-equilibrium energy distribution function picture without invoking multi-photon absorption processes. The existence of a frequency threshold above which such oscillations disappear lends further support to this explanation.

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