Abstract
Under a strong ac drive the zero-frequency linear response dissipative resistivity of a homogeneous state is allowed to become negative. We show that such a state is absolutely unstable. The only time-independent state of a system with a is characterized by a current which almost everywhere has a magnitude fixed by the condition that the nonlinear dissipative resistivity . As a result, the dissipative component of the dc-electric field vanishes. The total current may be varied by rearranging the current pattern appropriately with the dissipative component of the dc-electric field remaining zero. This result, together with the calculation of Durst et al., indicating the existence of regimes of applied ac microwave field and dc magnetic field where , explains the zero-resistance state observed by Mani et al. and Zudov et al..
- Received 3 February 2003
DOI:https://doi.org/10.1103/PhysRevLett.91.056803
©2003 American Physical Society