Magnetic-field dependence of the anomalous noise behavior in a two-dimensional electron system in silicon |
| |
Authors: | Jaroszyński J Popović Dragana Klapwijk T M |
| |
Affiliation: | National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA. jaroszy@magnet.fsu.edu |
| |
Abstract: | Studies of low-frequency resistance noise show that the dramatic change in the dynamics of the two-dimensional electron system (2DES) in Si that occurs near the metal-insulator transition (MIT) persists in high parallel magnetic fields B such that the 2DES is fully spin polarized. This strongly suggests that charge, as opposed to spin, degrees of freedom are responsible for this effect. In the metallic phase, however, noise is suppressed by a parallel B, pointing to the role of spins. At low B, the temperature dependence of conductivity in the metallic phase provides evidence for a MIT. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|