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Effects of strain on electron spin transport in semiconductor epilayers
Šimon Kosa , Scott A. Crookerb, Marina Hruskab , Avadh Saxenab , and Darryl L. Smithb
Theory of Condensed Matter Group, Cavendish Laboratory, Cambridge, CB3 0HE, United Kingdom
Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA
We develop a semiclassical kinetic theory of electron spin transport in strained semiconductors in the
presence of electric and magnetic fields. For the case of a uniaxial stress, the spin-orbit coupling of
electron spin to strain is shown to directly affect the spin precession frequency. The implications of this
theory in the diffusion approximation are found to be in excellent agreement with the scanning Kerr
microscopy images of spin flows in n:GaAs epilayers under a uniaxial stress in h110i direction.
Sorting category: Dd Conducting electrons in condensed matter
Keywords: semiconductors, spin, optics, strain