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- W1990092927 abstract "LiZnAs can be viewed as a zinc blende-like (ZnAs) - lattice partially filled with He-like Li + interstitials. Using a graphite crucible, we have grown LiZnAs by the directional solidification of Li, Zn, and As. The crystals (lattice constant a = 5.936 A) were metallic, dark gray and showed gradual oxidation and hygroscopy in air, changing to black. In purer p-type LiZnAs crystals with a hole concentration of ∼ 2 X 10 16 cm -3 , an emission observed at 766 nm (1.62 eV) was associated with the direct band-to-band (B-B) transition. In some crystals, an emission peak at 810 nm (1.53 eV) has been attributed to a donor-acceptor (DA) pair-recombination with an activation energy of ∼ 31 meV. Following the thermal quenching of the DA pair, the B-B transition appears, indicating the increase in the radiative-recombination probability of the B-B transition. According to the fitting parameter for PL data (using a simple direct B-B transition model), the predicted values of effective masses of electrons and holes of LiZnAs are likely to be close to or slightly larger than those of GaAs. From PL and optical absorption measurements, the direct band gap varies from 1.62 eV (at 25 K) to 1.51 eV (at 300 K) with dE g /dT - 3 X 10 -4 eV K -1 ." @default.
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- W1990092927 date "1996-09-01" @default.
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- W1990092927 title "Growth and photoluminescence properties of the filled tetrahedral semiconductor LiZnAs" @default.
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- W1990092927 doi "https://doi.org/10.1016/0022-0248(95)00512-9" @default.
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