Metal-Insulator Transition Tuned by External Gates in Hall Systems with Constrictions

Details Metal-Insulator Transition Tuned by External Gates in Hall Systems with Constrictions Metal-Insulator Transition Tuned by External Gates in Hall Systems with Constrictions

2005-12-22

arxiv.org/abs/cond-mat/0512589v2

Phys. Rev. Lett. 97, 046801 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.97.046801

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.

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