Magneto-optical evidence for fractional quantum Hall states down to filling factor 1/9

H. Buhmann; W. Joss; K. von Klitzing; I. V. Kukushkin; G. Martinez; A. S. Plaut; K. Ploog; V. B. Timofeev

doi:10.1103/PhysRevLett.65.1056

Magneto-optical evidence for fractional quantum Hall states down to filling factor 1/9

H. Buhmann, W. Joss, K. von Klitzing, I. V. Kukushkin, G. Martinez, A. S. Plaut, K. Ploog, and V. B. Timofeev

Phys. Rev. Lett. 65, 1056 – Published 20 August 1990

Abstract

Discontinuities have been observed in the energy dependence on magnetic field of the luminescence line corresponding to 2D electron-hole recombination in GaAs/AlGaAs heterojunctions at filling factors ν=2/3, 1/3, 4/5, 3/5, 2/5, 1/5, 1/7, and 1/9. We associate these energy-position shifts with discontinuous behavior of the chemical potential due to condensation of the 2D electrons into an incompressible Fermi-liquid state, and thereby evaluate the energy gaps at fractional filling factors down to 1/9.

Received 10 May 1990

DOI:https://doi.org/10.1103/PhysRevLett.65.1056

Authors & Affiliations

H. Buhmann, W. Joss, K. von Klitzing, I. V. Kukushkin, G. Martinez, A. S. Plaut, K. Ploog, and V. B. Timofeev

Max-Planck-Institut für Festkörperforschung, Hochfeld-Magnetlabor, Boîte Postale 166X, F-38042 Grenoble CEDEX, France
Max-Planck-Institut für Festkörperforschung, D-7000 Stuttgart 80, Federal Republic of Germany
Institute for Solid State Physics, Academy of Sciences of the U.S.S.R., 142432, Chernogolovka, U.S.S.R.
Service National des Champs Intenses, Centre National de la Recherche Scientifique, Boîte Postale 166X, F-38042 Grenoble CEDEX, France