Zero-field spin splitting in a two-dimensional electron gas.

摘要: The spin splitting in zero magnetic field which was recently reported ${\mathrm{In}}_{\mathit{x}}$${\mathrm{Ga}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$As/${\mathrm{In}}_{0.52}$${\mathrm{Al}}_{0.48}$As heterostructures is analyzed with use of the inversion-asymmetry, or ${\mathit{k}}^{3}$, term and interface orbit Rashba term. Comparison experimental data shows that dominant spin-splitting mechanism these samples. Zero-field splittings 2.5--2.75 meV are deduced from perpendicular-field data. Analysis tilted-magnetic-field gives g factors lie between -2 -3.