The Parallel Magnetoconductance of Interacting Electrons in a Two Dimensional Disordered System

Details The Parallel Magnetoconductance of Interacting Electrons in a Two Dimensional Disordered System The Parallel Magnetoconductance of Interacting Electrons in a Two Dimensional Disordered System

2001-10-11

arxiv.org/abs/cond-mat/0110235v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 6 figures

Scientific paper

10.1103/PhysRevB.65.125308

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.

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