Superconductivity in a two-dimensional Electron Gas
Abstract
In a series of recent experiments, Kravchenko and colleagues observed unexpectedly that a two-dimensional electron gas in zero magnetic field can be a conductor. The two-dimensionality was imposed by confining the electron gas to move laterally at the interface between two semiconductors. The observation of a conductor in two dimensions (2D) is surprising as the conventional theory of metals precludes the presence of a metallic state at zero temperature in 2D. Nonetheless, there are now several experiments confirming the existence of the new conducting phase in a dilute two-dimensional electron gas in zero magnetic field. Here we argue based on an analysis of the experiments and general theoretical grounds that this phase is a zero-temperature superconductor with an inhomogeneous charge density.
Cite
@article{arxiv.cond-mat/9709168,
title = {Superconductivity in a two-dimensional Electron Gas},
author = {Philip Phillips and Yi Wan and Ivar Martin and Sergey Knysh and Denis Dalidovich},
journal= {arXiv preprint arXiv:cond-mat/9709168},
year = {2009}
}
Comments
5 pages, 2 ps figures