Negative differential Rashba effect in two-dimensional hole systems
arXiv:cond-mat/0409372 · doi:10.1063/1.1806543
Abstract
We demonstrate experimentally and theoretically that two-dimensional (2D) heavy hole systems in single heterostructures exhibit a \emph{decrease} in spin-orbit interaction-induced spin splitting with an increase in perpendicular electric field. Using front and back gates, we measure the spin splitting as a function of applied electric field while keeping the density constant. Our results are in contrast to the more familiar case of 2D electrons where spin splitting increases with electric field.
3 pages, 3 figures. To appear in APL