The Parallel Magnetoconductance of Interacting Electrons in a Two Dimensional Disordered System
arXiv:cond-mat/0110235 · doi:10.1103/PhysRevB.65.125308
Abstract
The transport properties of interacting electrons for which the spin degree of freedom is taken into account are numerically studied for small two dimensional diffusive clusters. On-site electron-electron interactions tend to delocalize the electrons, while long-range interactions enhance localization. On careful examination of the transport properties, we reach the conclusion that it does not show a two dimensional metal insulator transition driven by interactions. A parallel magnetic field leads to enhanced resistivity, which saturates once the electrons become fully spin polarized. The strength of the magnetic field for which the resistivity saturates decreases as electron density goes down. Thus, the numerical calculations capture some of the features seen in recent experimental measurements of parallel magnetoconductance.
10 pages, 6 figures
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- Metal-insulator transition in the disordered Hubbard model of the Lieb lattice
- Delocalization due to correlations in two-dimensional disordered systems
- Spin magnetization of strongly correlated electron gas confined in a two-dimensional finite lattice
- On-Site Interaction Effects on Localization : Dominance of Non-Universal Contributions
- Spin polarization and effective mass: a numerical study in disordered two dimensional systems