| Studies of Skyrmions at ν=1 in the Limit of Zero g-factor. (2008) | |||||||||||||
Abstract | |||||||||||||
| In a two-dimensional electron gas at ν=1 (where the filling factor ν=neh/eB measures how many Landau levels (LL) are filled) the ground state should be regarded as a ferromagnet since all the spin down states in the lowest LL are occupied while all the spin up states are empty. In GaAs the single particle (SP) Zeeman energy (ZE) gμBB is very small 0.3 K/T, and Coulomb interactions are very significant. This has led several authors to suggest that novel charged excitations with number of reversed spin R> 1, and with non-trivial spin order, known as charged spin-texture excitations or Skyrmions, may occur [1,2]. This type of excitation is based on a spin texture that consists of a central reversed spin surrounded by rings of spin that gradually cant in a radial direction until at the edge they are aligned with the external magnetic field. The balance between the SPZE and the Coulomb energy is | |||||||||||||
Publication details | |||||||||||||
| |||||||||||||