Heat Capacity Evidence for the Suppression of Skyrmions at Large Zeeman Energy
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 ratio g~ between the Zeeman and Coulomb energies exceeds a critical value g~c~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 above g~c. Our experimental g~c is smaller than the calculated g~c = 0.054 for an ideal 2DES. We discuss possible origins of this discrepancy.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 1999
- DOI:
- 10.1103/PhysRevLett.82.2764
- arXiv:
- arXiv:cond-mat/9810373
- Bibcode:
- 1999PhRvL..82.2764M
- Keywords:
-
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- Experimental paper, 6 figures