Abstract
The influence of Coulomb interaction and weak perpendicular magnetic field on the transport properties of spinless electrons in small disordered two dimensional systems is studied within a tight binding model. We trace the participation ratio of the renormalized zero-temperature tunneling amplitude as function of interaction strength U and magnetic field H, and find typical negative magnetoresistance for small disorder, while the behavior is more complicated for stronger disorder. The results suggest an effective weakening of the magnetic field for stronger Coulomb interaction in agreement with previous results for quantum dots.
| Original language | English |
|---|---|
| Pages (from-to) | 359-367 |
| Number of pages | 9 |
| Journal | Physica A: Statistical Mechanics and its Applications |
| Volume | 302 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - 15 Dec 2001 |
| Event | International Workshop on Frontiers in the Physics of Complex Systems - Ramat-Gan, Israel Duration: 25 Mar 2001 → 28 Mar 2001 |
Bibliographical note
Funding Information:We would like to thank the Minerva Foundation for financial support. JK and RB are indebted to the NEC Research Institute, Princeton, and Prof. B. Altshuler for hospitality during a visit.
Funding
We would like to thank the Minerva Foundation for financial support. JK and RB are indebted to the NEC Research Institute, Princeton, and Prof. B. Altshuler for hospitality during a visit.
| Funders | Funder number |
|---|---|
| Minerva Foundation |
Keywords
- Coulomb interaction
- Exact diagonalization
- Magnetoresistance
- Tunneling amplitude
- Weak localization