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- W2070633200 abstract "Strong spin-flip-related Raman scattering (SFRS) from p-type Be-doped GaAs/${mathrm{Al}}_{mathit{x}}$${mathrm{Ga}}_{1mathrm{ensuremath{-}}mathit{x}}$As multiple quantum wells (MQW's), as well as from an undoped sample, has been observed. In both cases the SFRS exhibits a strong dependence on the geometry of the experiment. A theory is developed that explains SFRS in p-type MQW's as related to a spin flip of a hole bound to an acceptor via exchange interaction with a neighboring exciton. SFRS in the undoped MQW's is explained as a flip of the angular momentum of an exciton localized by interface roughness via interaction with acoustic phonons (doubly resonant scattering by acoustic phonons). The g tensor of the hole bound to the acceptor is determined to be ${mathit{g}}_{mathrm{ensuremath{parallel}}}$=+2.3, ${mathit{g}}_{mathrm{ensuremath{perp}}}$ensuremath{simeq}0, and that of the localized exciton (${mathit{g}}_{mathit{h}}$-${mathit{g}}_{mathit{e}}$${)}_{mathrm{ensuremath{parallel}}}$=+1.5, (${mathit{g}}_{mathit{h}}$-${mathit{g}}_{mathit{e}}$${)}_{mathrm{ensuremath{perp}}}$ensuremath{simeq}0 for the narrowest wells measured (ensuremath{sim}40 AA{})." @default.
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- W2070633200 date "1992-02-15" @default.
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- W2070633200 title "Spin-flip Raman scattering in GaAs/AlxGa1−xAs multiple quantum wells" @default.
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- W2070633200 doi "https://doi.org/10.1103/physrevb.45.4320" @default.
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