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• W54651969 abstract "The elements of the electric field gradient tensor at Li position in the intercalation compound ${mathrm{Li}}_{x}mathrm{Ti}{mathrm{S}}_{2}$ (with $x=0.25$, 0.33, 0.67, and 1.0) were calculated with first-principles methods and periodic supercell models. The theoretical results obtained with density functional and Hartree-Fock hybrid methods were compared with experimental field gradients extracted from $^{7}mathrm{Li}$ NMR spectra from the literature and from our measurements presented here. The dependence of calculated field gradients on the basis set and the explicit form of the exchange-correlation density functional was investigated. In agreement with earlier studies a pronounced effect of polarization functions at the Li site was observed. After optimization of internal degrees of freedom in $mathrm{Li}mathrm{Ti}{mathrm{S}}_{2}$ all methods under consideration give quadrupole coupling constants in close agreement with experiment. For $x<1$ the calculated quadrupole coupling constants were found to depend more sensitively on the method which was attributed to differences in the description of spin localization. The calculations allow one to distinguish between Li atoms placed at octahedral and tetrahedral interstitial sites of the host lattice $mathrm{Ti}{mathrm{S}}_{2}$." @default.
• W54651969 created "2016-06-24" @default.
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• W54651969 date "2004-09-27" @default.
• W54651969 modified "2023-10-10" @default.
• W54651969 title "Electric field gradient calculations for<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mi mathvariant=normal>Li</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:mi mathvariant=normal>Ti</mml:mi><mml:msub><mml:mi mathvariant=normal>S</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>and comparison with<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mmultiscripts><mml:mi mathvariant=normal>Li</mml:mi><mml…" @default.
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• W54651969 doi "https://doi.org/10.1103/physrevb.70.115111" @default.
• W54651969 hasPublicationYear "2004" @default.
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