Observation of microwave-induced zero-conductance state in Corbino rings of a two-dimensional electron system |
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Authors: | Yang C L Zudov M A Knuuttila T A Du R R Pfeiffer L N West K W |
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Affiliation: | Department of Physics, University of Utah, Salt Lake City, UT 84112, USA. |
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Abstract: | Using Corbino samples we have observed oscillatory dc conductance in a high-mobility two-dimensional electron system when it is subjected to crossed microwave and magnetic fields. At the strongest of the oscillation minima the conductance is found to be vanishingly small, indicating a macroscopic insulating state associated with this minimum. With increasing voltage bias, a crossover from Ohmic to electron-heating regime is observed. |
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