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Geometrical commensurability oscillations in the magnetoresistance of a two-dimensional electron gas under microwave irradiation

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Kukushkin,  I. V.
Research Group Solid State Nanophysics (Jurgen H. Smet), Max Planck Institute for Solid State Research, Max Planck Society;
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Smet,  J. H.
Research Group Solid State Nanophysics (Jurgen H. Smet), Max Planck Institute for Solid State Research, Max Planck Society;
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Fal'ko,  V. I.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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von Klitzing,  K.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Eberl,  K.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Kukushkin, I. V., Smet, J. H., Fal'ko, V. I., von Klitzing, K., & Eberl, K. (2002). Geometrical commensurability oscillations in the magnetoresistance of a two-dimensional electron gas under microwave irradiation. Physical Review B, 66(12): 121306.


Cite as: https://hdl.handle.net/21.11116/0000-000E-E2B5-6
Abstract
We report on 1/B-periodic magnetoresistance oscillations in a
two-dimensional electron system induced by microwave
irradiation. They are only present in high mobility samples
when an initial light pulse has created a persistent
photoconductive channel in the adjacent donor layer. The
oscillations manifest a geometric commensurability between the
electron cyclotron orbit and a steady-state periodic density
modulation. The latter may originate from the non-linear
dynamical screening of a surface acoustic wave potential in the
persistent photoconductive channel, triggered by the incident
monochromatic microwave.