Melinte, Sorin
[UCL]
Grivei, E.
Bayot, Vincent
[UCL]
Shayegan, M.
Measurements on a multilayer two-dimensional electron system (2DES) near Landau-level filling nu = 1 reveal the disappearance of the nuclear spin contribution to the heat capacity as the ratio (g) over tilde between the Zeeman and Coulomb energies exceeds a critical value (g) over tilde(c) approximate to 0.04. This disappearance suggests the vanishing of the Skyrmion-mediated coupling between the lattice and the nuclear spills as the spin excitations of the 2DES make a transition from Skyrmions to single spin flips; above (g) over tilde(c). Our experimental g, is smaller than the calculated (g) over tilde(c) = 0.054 for an ideal 2DES. We discuss possible origins of this discrepancy. [S0031-9007(99)08835-3].
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Bibliographic reference |
Melinte, Sorin ; Grivei, E. ; Bayot, Vincent ; Shayegan, M.. Heat capacity evidence for the suppression of skyrmions at large Zeeman energy.. In: Physical Review Letters, Vol. 82, no. 13, p. 2764-2767 (1999) |
Permanent URL |
http://hdl.handle.net/2078.1/44551 |