Metal-Insulator Transition Tuned by External Gates in Hall Systems with Constrictions
Strongly Correlated Electrons
2009-11-11 v2 Mesoscale and Nanoscale Physics
Abstract
The nature of a metal-insulator transition tuned by external gates in quantum Hall (QH) systems with point constrictions, as reported in recent experiments of Roddaro et al [1], is examined. We attribute this phenomenon to a splitting of the integer edge into conducting and insulating stripes, the latter wide enough to allow for the stability of the edge structure. Inter-channel impurity scattering and inter-channel Coulomb interactions do not destabilize this picture.
Keywords
Cite
@article{arxiv.cond-mat/0512589,
title = {Metal-Insulator Transition Tuned by External Gates in Hall Systems with Constrictions},
author = {Emiliano Papa and Tilo Stroh},
journal= {arXiv preprint arXiv:cond-mat/0512589},
year = {2009}
}
Comments
4 pages, 6 figures