Effect of the spin-orbit interaction on the band structure and conductance of quasi-one-dimensional systems

摘要

We discuss the effect of the spin-orbit interaction on the band structure,wave functions and low temperature conductance of long quasi-one-dimensionalelectron systems patterned in two-dimensional electron gases (2DEG). Our modelfor these systems consists of a linear (Rashba) potential confinement in thedirection perpendicular to the 2DEG and a parabolic confinement transverse tothe 2DEG. We find that these two terms can significantly affect the bandstructure introducing a wave vector dependence to subband energies, producingadditional subband minima and inducing anticrossings between subbands. Wediscuss the origin of these effects in the symmetries of the subband wavefunctions.