Size-dependent analysis of the metal-insulator transition in the integral quantum hall effect

verfasst von

S. Koch, R. J. Haug, K. V. Klitzing, K. Ploog

Abstract

The critical exponent of the localization length in the integral quantum Hall regime can be measured directly using the Hall-bar geometries with different sizes. We obtain a universal behavior for the three lowest Landau levels. This is in agreement with the universality prediction of the field-theoretic approach to the metal-insulator transition in the quantum Hall effect. The value of =2.30.1 agrees with recent numerical studies for the lowest Landau level. The measured value of the temperature exponent of the inelastic-scattering rate is found to range from p=2.70.3 to p=3.40.4.

Externe Organisation(en)

Max-Planck-Institut für Festkörperforschung

Typ

Artikel

Journal

Physical review letters

Band

67

Seiten

883-886

Anzahl der Seiten

4

ISSN

0031-9007

Publikationsdatum

01.01.1991

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Elektronische Version(en)

https://doi.org/10.1103/PhysRevLett.67.883 (Zugang: Unbekannt)