Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
1998-12-11
Physics
Condensed Matter
Disordered Systems and Neural Networks
10 pages,5 figures, published in the proceedings of PILS'98, Annalen der Physik (Leipzig)
Scientific paper
10.1002/(SICI)1521-3889(199811)7
In the absence of magnetic field or spin-orbit coupling the one-parameter scaling theory predicts localization of all states in two-dimensional (2D) disordered systems, for any amount of disorder. However, a 2D metallic phase has been recently reported in high mobility Si-MOS and GaAs-based materials without magnetic field. We study numerically a recently proposed 2D model which consists of a compactly coupled pure-random plane structure. This allows to obtain exactly a continuum of one-dimensional ballistic extended states which can lead to a marginal metallic phase of finite conductivity $\sigma_{0}=2e^2/h$, in a wide energy range whose boundaries define the mobility edges of a first-order metal-insulator transition. We present numerical diagonalization results and the conductivity of the system in perpendicular magnetic field, which verify the above analytical predictions. The model is also discussed in connection to recent experiments.
Evangelou S. N.
Katomeris G. N.
Xiong Shie-Jie
No associations
LandOfFree
First Order Metal-Insulator Transition in Two-dimensional Disordered Systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with First Order Metal-Insulator Transition in Two-dimensional Disordered Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First Order Metal-Insulator Transition in Two-dimensional Disordered Systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-38414