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 [01̄1] while it has strong N dependence for B [2̄33]. 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 [01̄1] direction. In our samples we can clearly associate the difference with anisotropy of spin-orbit interactions.
Original language | English (US) |
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Article number | 126401 |
Journal | Physical review letters |
Volume | 100 |
Issue number | 12 |
DOIs | |
State | Published - Mar 28 2008 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy