Phys. Rev. Lett. 91, 096803 (2003) [4 pages]Observation of Microwave-Induced Zero-Conductance State in Corbino Rings of a Two-Dimensional Electron SystemReceived 30 March 2003; published 29 August 2003 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. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.096803
DOI:
10.1103/PhysRevLett.91.096803
PACS:
73.21.–b, 72.40.+w, 73.43.–f
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