Measurements of Composite Skyrmions at Filling Factor 1/3

D.R.Leadley1, R.J.Nicholas2, D.K.Maude3, A.N.Utjuzh4, J.C.Portal3, J.J.Harris5 and C.T.Foxon6
  1. Department of Physics, University of Warwick, Coventry, CV4 7AL, UK
  2. Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX3 9NL, UK
  3. Grenoble High Magnetic Field Laboratory, MPI-CNRS, BP 166, 38042 Grenoble Cedex 9, France
  4. Russian Academy of Sciences, Institute of High Pressure Physics, 142092 Troitsk, Russia
  5. Department of Electronic and Electrical Enginering, University College, London, WC1E 7JE, UK
  6. Department of Physics, Nottingham University, University Park, Nottingham, NG7 2RD, UK
Measurements of the fractional quantum Hall effect energy gaps at high pressures are presented that provide evidence for the existence of composite Skyrmions. Just as charged spin textures known as Skyrmions are thought to be the lowest lying excitations for electrons at v=1, we show that composite Skyrmions can be formed at v=1/3 when the electron g-factor is sufficiently small.

Keywords: Fractional quantum Hall effect, Skyrmions, composite Fermions.

12th International Conference on the Electronic Properties of Two-Dimensional Systems (Tokyo 1997).

[-PDF-]Paper (139 k PDF file)  Physica B 249-251, 23 (1998)