Magnetoresistance Oscillations in Two-dimensional Electron Systems Induced by AC and DC Fields
Mesoscale and Nanoscale Physics
2007-05-23 v1
Abstract
We report on magnetotransport measurements in a high-mobility two-dimentional electron system subject simultaneously to AC (microwave) and DC (Hall) fields. We find that DC excitation affects microwave photoresistance in a nontrivial way. Photoresistance maxima (minima) evolve into minima (maxima) and back, reflecting strong coupling and interplay of AC- and DC-induced effects. Most of our observations can be explained in terms of indirect electron transitions using a new, ``combined'' resonant condition. Observed quenching of microwave-induced zero resistance by a DC field cannot be unambiguously linked to a domain model, at least until a systematic theory treating both excitation types within a single framework is developed.
Keywords
Cite
@article{arxiv.cond-mat/0701726,
title = {Magnetoresistance Oscillations in Two-dimensional Electron Systems Induced by AC and DC Fields},
author = {W. Zhang and M. A. Zudov and L. N. Pfeiffer and K. W. West},
journal= {arXiv preprint arXiv:cond-mat/0701726},
year = {2007}
}