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We calculate the contribution of the photon-assisted interaction of electronswith leaky interface phonons to the dissipative dc photoconductivity of atwo-dimensional electron system in a magnetic field. The calculatedphotoconductivity as a function of the frequency of microwave radiation and themagnetic field exhibits pronounced oscillations. The obtained oscillationstructure is different from that in the case of photon-assisted interactionwith impurities. We demonstrate that at a sufficiently strong microwaveradiation in the certain ranges of its frequency (or in certain ranges of themagnetic field) this mechanism can result in the absolute negativeconductivity.Comment: 3 pages, 1 figur

Microwave photoconductivity in two-dimensional electron systems due to photon-assisted interaction of electrons with leaky interface phonons