Dependence of Spin Susceptibility of a Two-Dimensional Electron System on the Valley Degree of Freedom
Dependence of Spin Susceptibility of a Two-Dimensional Electron System on the Valley Degree of Freedom
We report measurements of the spin susceptibility, $\chi\propto g_v g^*m^*$, in an AlAs two-dimensional electron system where, via the application of in-plane stress, we transfer electrons from one conduction-band valley to another ($g_v$ is the valley degeneracy, and $m^*$ and $g^*$ are the electron effective mass and g-factor). At a …