Charge-spin excitations of the Ising-type fractional quantum Hall ferromagnets

authored by
Karel Výborný, Annelene F. Dethlefsen, Rolf J. Haug, Arkadiusz Wójs
Abstract

We study the low-lying excitations from the fractional quantum Hall states at filling factors 2/3 and 2/5 and argue that the charge-carrying excitations involve spin flips, and, in particular, possibly more than one. Energies obtained by exact diagonalization and transport activation gaps measured over a wide range of magnetic fields are invoked. We discuss the relevance of the noninteracting composite-fermion picture where both fractions correspond to the same filling factor 2 of the composite fermions.

Organisation(s)
Institute of Solid State Physics
External Organisation(s)
Czech Academy of Sciences (CAS)
Solar Systems Pty. Ltd.
Wroclaw University of Technology
University of Cambridge
Type
Article
Journal
Physical Review B - Condensed Matter and Materials Physics
Volume
80
ISSN
1098-0121
Publication date
09.07.2009
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Electronic version(s)
https://doi.org/10.1103/PhysRevB.80.045407 (Access: Closed)
https://doi.org/10.15488/2865 (Access: Open)