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- W1978461769 abstract "Heavily C-doped GaAs epitaxial layers with holes concentrations ranging from 1019 to 1.6×1020 cm−3 have been grown by metal organic vapour phase epitaxy (MOVPE) using CCl4 as C-growth precursor. The carbon doping characteristics of GaAs epilayers have been investigated by optimizing the V/III ratio and the growth temperature. Additional informations have been extracted from the evolution of the in situ reflectivity signal during the growth of GaAs:C. The appearance of discernible oscillations in the reflectivity response indicates the high carbon incorporation and the good surface quality in spite of the CCl4 etching effect. The hole concentration tends to saturate at about 1.5×1020 cm−3. The comparison between Hall effect measurements realized on sets of as grown and annealed layers, and theoretical calculations of the mobility lead to the determination of the compensation ratio of the samples. The lattice matching conditions were systematically investigated by using high X-ray diffraction measurements from (004) and (115) planes. A comparison between the experimental mismatch and the one calculated with the Vegard's law allows the estimation of the possible origin of the compensation. Secondary ion mass spectrometry, scanning electron microscopy and atomic force microscopy have been used as complementary tools to characterize the films." @default.
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- W1978461769 date "2006-02-01" @default.
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- W1978461769 title "In depth study of the compensation in annealed heavily carbon doped GaAs" @default.
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- W1978461769 doi "https://doi.org/10.1016/j.mejo.2005.02.127" @default.
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