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- W2076696191 abstract "Geometries of the gallium arsenide doublet radicals GaAs 2 , Ga 2 As, Ga 2 As 3 , Ga 3 As 2 , GaAs 4 , and Ga 4 As were optimized by the B3LYP/6-311+G(2df) method and compared with literature values. For the global minimum, as well as for isomers lying up to 0.2 eV higher, hyperfine coupling constants (HFCC) and electron-spin g-tensors were calculated. For HFCCs the B3LYP/6-311+G(2df) method was used, whereas for g-tensors second-order perturbation calculations with multireference configuration interaction wave functions and a valence triple-< basis set with polarization functions (TZVP) were performed. Generally, due to the low s-spin and high p-spin densities, A i s o values are small, and A d i p 's large. The g-shifts (Δg = g - g e ) are on the order of 100 000 ppm, caused by large spin-orbit couplings and low excitation energies. For the experimentally known Ga 2 As 3 , values calculated for the D 3 h structure are (A's in MHz, Δg's in ppm) A i s o ( 6 9 Ga) = 1325 (1524); A i s o ( 7 5 As) = -23 (65); A d i p ( 6 9 Ga) = 65 (87); A d i p ( 7 5 As) = 36 (0); Δg⊥ = -73 410 (-82 300); and Δg∥ = 6460 (0), with magnetic parameters derived from the experimental values in parentheses. Mulliken spin densities are shown to be a good measure of A d i p values. Vertical excitation energies, as obtained from the g-tensor calculations, are also tabulated." @default.
- W2076696191 created "2016-06-24" @default.
- W2076696191 creator A5018108220 @default.
- W2076696191 creator A5038332899 @default.
- W2076696191 date "2003-09-10" @default.
- W2076696191 modified "2023-09-24" @default.
- W2076696191 title "Geometries, Electronic <i>g</i>-tensor Elements, Hyperfine Coupling Constants, and Vertical Excitation Energies for Small Gallium Arsenide Doublet Radicals, Ga<i><sub>x</sub></i>As<i><sub>y</sub></i> (<i>x</i> + <i>y</i> = 3, 5)" @default.
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- W2076696191 doi "https://doi.org/10.1021/jp035589d" @default.
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