Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2003-05-14
Phys. Rev. B 69, 045317 (2004)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
10 pages, 6 figures
Scientific paper
10.1103/PhysRevB.69.045317
Inversion asymmetry induced spin splitting of the electron states in quasi two-dimensional (2D) systems can be attributed to an effective magnetic field B which varies in magnitude and orientation as a function of the in-plane wave vector k||. Using a realistic 8x8 Kane model that fully takes into account spin splitting because of both bulk inversion asymmetry and structure inversion asymmetry we investigate the spin orientation and the effective field B for different configurations of a quasi 2D electron system. It is shown that these quantities depend sensitively on the crystallographic direction in which the quasi 2D system was grown as well as on the magnitude and orientation of the in-plane wave vector k||. These results are used to discuss how spin-polarized electrons can precess in the field B(k||). As a specific example we consider GaInAs-InP quantum wells.
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