Author/Authors :
S Melinte، نويسنده , , Grivei، Eusebiu نويسنده , , J.-M Beuken، نويسنده , , Leonie Mariage، نويسنده , , L Malcorps، نويسنده , , C Gustin، نويسنده , , V Bayot، نويسنده , , M Shayegan، نويسنده ,
Abstract :
By controlling the ratio η between the Zeeman and Coulomb energies, the heat capacity of a multilayer two-dimensional electron system (2DES) is measured near Landau level filling ν=1 at 60 mK. The data reveal the disappearance of the nuclear spin contribution of GaAs quantum wells to the heat capacity as η exceeds a critical value ηC≈0.04. This result is interpreted as the effect of the transition from Skyrmions to single electron spin flips at large Zeeman energy.
