Electron correlations due to pair spin–orbit interaction in 2D electron systems

We show that the pair spin–orbit interaction (PSOI) created by Coulomb fields of interacting electrons leads to appearance an unconventional correlated electronic state in two-dimensional materials with large Rashba effect. The effect manifests itself at sufficiently strong PSOI as a sharp peak structure factor, indicating tendency form striped spatial scale determined competition between repulsion and PSOI-induced attraction electrons. Above critical value PSOI, system becomes unstable respect charge density fluctuations on this scale.