Phys. Rev. B 73, 241316(R) (2006) [4 pages]Mechanical control of spin-orbit splitting in GaAs and In0.04Ga0.96As epilayers
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. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.73.241316
DOI:
10.1103/PhysRevB.73.241316
PACS:
72.25.Dc, 72.25.Rb, 71.70.Ej, 71.70.Fk
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