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- W2390134259 abstract "Hexagonal Mg_xZn_ 1-xO alloy layers with 0≤x0.3 have been grown by plasma-assisted molecular beam epitaxy on sapphire (006) substrates. Their crystal structures are characterized by X-ray diffraction spectroscopy. The resonant Raman spectra were measured using 325 nm line from He-Cd laser by backscatte- ring geometry. The long wavelength frequencies of ZnO-like optical phonons measured in the resonant Raman spectra can be expressed as linear functions of x: ω(LO)=(580+147x) cm -1.ZnO /Mg_ 0.12Zn_ 0.88O single-quantum well (SQW) with 1.5 nm ZnO well width was grown on sapphire substrate. In the PL spectra at 5 K, P band located at 3.371 eV was observed. At excitation densities higher than 76 kW/cm2, the P band shows a typical super linear increase characteristic. With increasing the excitation density further, the P band converges gradually at the saturation value of 3.354 eV with significant narrowing. It was attributed to the gradually enhanced exciton-exciton scattering. The integrated emission intensity versus excitation density follows the relation of I 3.13_ ex. This superlinear increase indicates the typical properties of a super-radiation recombination." @default.
- W2390134259 created "2016-06-24" @default.
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- W2390134259 date "2006-01-01" @default.
- W2390134259 modified "2023-09-25" @default.
- W2390134259 title "Mg_xZn_(1-x)O Alloy Grown by P-MBE and Optical Properties of MgZnO/ZnO Heterostructure" @default.
- W2390134259 hasPublicationYear "2006" @default.
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