Heat capacity evidence for the suppression of skyrmions at large zeeman energy

S. Melinte, E. Grivei, V. Bayot, M. Shayegan

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Abstract

Measurements on a multilayer two-dimensional electron system (2DES) near Landau-level filling ν = 1 reveal the disappearance of the nuclear spin contribution to the heat capacity as the ratiog between the Zeeman and Coulomb energies exceeds a critical valuegc≈ 0.04. This disappearance suggests the vanishing of the Skyrmion-mediated coupling between the lattice and the nuclear spins as the spin excitations of the 2DES make a transition from Skyrmions to single spin flips abovegc. Our experimentalgcis smaller than the calculatedgc= 0.054 for an ideal 2DES. We discuss possible origins of this discrepancy.

Original languageEnglish (US)
Pages (from-to)2764-2767
Number of pages4
JournalPhysical review letters
Volume82
Issue number13
DOIs
StatePublished - Jan 1 1999

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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