title: Observation of microwave-induced zero-conductance state in Corbino rings of a two-dimensional electron system.
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.
authors.affiliation: Department of Physics, University of Utah, Salt Lake City, UT 84112, USA.
authors.forename: C L
authors.initials: CL
authors.lastname: Yang
authors.forename: M A
authors.initials: MA
authors.lastname: Zudov
authors.forename: T A
authors.initials: TA
authors.lastname: Knuuttila
authors.forename: R R
authors.initials: RR
authors.lastname: Du
authors.forename: L N
authors.initials: LN
authors.lastname: Pfeiffer
authors.forename: K W
authors.initials: KW
authors.lastname: West