Published in:
Physical Review Letters 100,12 (2008)
Link to original published article:
http://dx.doi.org/10.1103/PhysRevLett.100.126401
Abstract
We investigate effects of lateral confinement on spin splitting of energy levels in 2D hole gases grown on [311] GaAs. We found that lateral confinement enhances anisotropy of spin splitting relative to the 2D gas for both confining directions. Unexpectedly, the effective g factor does not depend on the 1D energy level number N for B parallel to[0 (1) over bar1] while it has strong N dependence for B parallel to[(2) over bar 33]. Apart from quantitative difference in the spin splitting of energy levels for the two orthogonal confinement directions, we also report qualitative differences in the appearance of spin-split plateaus, with nonquantized plateaus observed only for the confinement in the [0 (1) over bar1] direction. In our samples we can clearly associate the difference with anisotropy of spin-orbit interactions.
Keywords
Physics, Multidisciplinary
Date of this Version
January 2008