Article Title

Mechanical control of spin-orbit splitting in GaAs and In0.04Ga0.96As epilayers

Type of Work

Article

Date

6-27-2006

Journal Title

Physical Review B

Journal ISSN

2469-9969

Journal Volume

73

Journal Issue

24

First Page

241316

DOI

10.1103/PhysRevB.73.241316

Abstract

Time-resolved Kerr rotation spectroscopy as a function of pump-probe distance, voltage, and magnetic field is used to measure the momentum-dependent spin splitting energies in GaAs and InGaAs epilayers. The strain of the samples can be reproducibly controlled in the cryostat using three- and four-point bending applied with a mechanical vise. We find that the magnitude of the spin splitting increases linearly with applied tension and voltage. A strain-drift-diffusion model is used to determine the value of the spin-strain coupling coefficient for a strained GaAs epilayer.

Hamilton Areas of Study

Physics

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