| Zugriffsnummer | 14744 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Metal-insulator transition in two-dimensional disordered systems with power-law transfer terms |
| Autor(in); Institution |
Potempa, Hilmar; Q.104, Kritisches Verhalten und Frequenzabhängigkeit beim QHE, PTB-Braunschweig
Schweitzer, Ludwig; Q.104, Kritisches Verhalten und Frequenzabhängigkeit beim QHE, PTB-Braunschweig
|
| Quelle/Jahr | Physical Review B: 65 (2002), 201105-1 - 201105-4 |
| ISSN | 0163-1829 |
| DOI | |
| Klassifikationscode | PACS: 71.30.+h ; PACS: 73.43.-f |
| Zusammenfassung | We investigate a disordered two-dimensional lattice model for noninteracting electrons with long-range power-law transfer terms and apply the method of level statistics for the calculation of the critical properties. The eigenvalues used are obtained numerically by direct diagonalization. We find a metal-insulator transition for a system with orthogonal symmetry. The exponent governing the divergence of the correlation length at the transition is extracted from a finite size scaling analysis and found to be ν=2.6±0.15. The critical eigenstates are also analyzed and the distribution of the generalized multifractal dimensions is extrapolated. |
