title: Evidence for a new dissipationless effect in 2D electronic transport.
abstract: In an ultraclean 2D electron system (2DES) subjected to crossed millimeterwave (30-150 GHz) and weak (B<2 kG) magnetic fields, a series of apparently dissipationless states emerges as the system is detuned from cyclotron resonances. Such states are characterized by an exponentially vanishing low-temperature diagonal resistance and a classical Hall resistance. The activation energies associated with such states exceed the Landau level spacing by an order of magnitude. Our findings are likely indicative of a collective ground state previously unknown for 2DES.
authors.affiliation: Department of Physics, University of Utah, Salt Lake City, Utah 84112.
authors.forename: M A
authors.initials: MA
authors.lastname: Zudov
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