Anisotropic modification of the effective hole g factor by electrostatic confinement

S. P. Koduvayur, L. P. Rokhinson, D. C. Tsui, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

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 languageEnglish (US)
Article number126401
JournalPhysical review letters
Volume100
Issue number12
DOIs
StatePublished - Mar 28 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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