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- W2034559547 abstract "Abstract A new method for calculation of electronic structure for LiNbO3-Nd,MgO was proposed. Our approach is based on molecular dynamics simulation and quantum chemical calculations. The crystalline structure is presented as a superposition of ideal translational lattices. Dopants are considered as modulation centers taken with appropriating weighting factors. We have found that the more probable are two types of local dopants. The first one corresponds to the MgNb configuration and the second to the NdLi centers. Other possible structural configurations were also taken into account. From the ab initio norm-conserving pseudopotential (PP) calculations modified by the LCAO quasi-core states we have calculated electronic part of electrooptic tensor component r222 tensor component. Simultaneously we have evaluated phonon and electron-phonon anharmonic contributions to the r222 tensor component. Role of the particular structural fragments effectively contributing to the electrooptic coefficient is clarified. We have compared theoretically calculated values with the experimental data with the different Nd and Mg contents. Essential role of the electron-phonon contributions in the observed dependencies have been revealed." @default.
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- W2034559547 date "1999-01-01" @default.
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- W2034559547 title "Influence of Nd:MgO dopants on the electrooptical effect in LiNbO3single crystals" @default.
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- W2034559547 doi "https://doi.org/10.1080/00150199908225284" @default.
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