| タイトル | Dipole-field sums and Lorentz factors for orthorhombic lattices, and implications for polarizable molecules |
| 著者（英） | Taylor, P. L.; Purvis, C. K. |
| 著者所属（英） | NASA Lewis Research Center|Case Western Reserve Univ. |
| 発行日 | 1982-10-15 |
| 言語 | eng |
| 内容記述 | A method for computing the Lorentz tensor components in single crystals via rapidly convergent sums of Bessels functions is developed using the relationship between dipole-field sums and the tensor components. The Lorentz factors for simple, body-centered, and base-centered orthorhombic lattices are computed using this method, and the derivative Lorentz factors for simple orthorhombic lattices are also determined. Both the Lorentz factors and their derivatives are shown to be very sensitive to a lattice structure. The equivalent of the Clausius-Mossotti relation for general orthorhombic lattices is derived using the Lorentz-factor formalism, and the permanent molecular dipole moment is related to crystal polarization for the case of a ferroelectric of polarizable point dipoles. It is concluded that the polarization enhancement due to self-polarization familiar from classical theory may actually be a reduction in consequences of negative Lorentz factors in one or two lattice directions for noncubic crystals. |
| NASA分類 | SOLID-STATE PHYSICS |
| レポートNO | 83A17226 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/406058 |
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