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

verfasst von

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.

Organisationseinheit(en)

Institut für Festkörperphysik

Externe Organisation(en)

Akademie Věd České Republiky (AV ČR)
Solar Systems Pty. Ltd.
Wroclaw University of Technology
University of Cambridge

Typ

Artikel

Journal

Physical Review B - Condensed Matter and Materials Physics

Band

80

ISSN

1098-0121

Publikationsdatum

09.07.2009

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Physik der kondensierten Materie

Elektronische Version(en)

https://doi.org/10.1103/PhysRevB.80.045407 (Zugang: Geschlossen)
https://doi.org/10.15488/2865 (Zugang: Offen)