Zero-field spin splitting in GaAs/AlGaAs 2D holes

J. P. Lu, M. Shayegan

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

From Fourier analysis of the low-magnetic-field Shubnikov-de Haas oscillations, we quantitatively determine the spin splitting, in the limit of zero magnetic field, for high-mobility two-dimensional hole systems confined to GaAs/AlGaAs heterostructures. The spin-splitting can be tuned continuously from large values to nearly zero in a square quantum well whose charge distribution can be controlled from being asymmetric to symmetric via the application of a front-gate bias. In a triangular well with an asymmetric potential, we always observe substantial spin splitting. In the latter system, our measured commensurability oscillations, induced by a one-dimensional periodic potential, reveal two frequencies, providing clear evidence for spin-resolved ballistic transport.

Original languageEnglish (US)
Pages (from-to)685-688
Number of pages4
JournalPhysica B: Condensed Matter
Volume249-251
DOIs
StatePublished - Jun 17 1998

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Keywords

  • Ballistic transport
  • Spin-splitting
  • Two-dimensional hole systems

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