Lattice dynamics of sapphire (corundum)
Lattice dynamics of sapphire (corundum)
复制标题
蓝宝石（刚玉）的晶格动力学
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
W. Kappus
中科院分区：
文献类型：
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作者：
W. Kappus
基于刚性离子的假设，对蓝宝石（α -Al_2 O_3）晶格动力学的理论模型进行了拟合，得到了布里渊区Γ点声子的测量值。通过假设接触离子之间的2体相互作用来考虑短程相互作用。额外的三体交互不能显著改善拟合。计算的色散曲线，并与非弹性中子散射数据进行比较。可以说，分支沿着三角轴的一个很好的协议。
Theoretical models of the lattice dynamics of sapphire (α — Al2O3), based on the assumption of rigid ions, have been fitted to measured phonons at theΓ-point of the Brillouin zone. Short range interactions were taken into account by assuming 2-body interactions between touching ions. Additional 3-body interactions could not improve the fit significantly. Calculated dispersion curves are presented and compared with inelastic neutron scattering data. A good agreement for branches along the trigonal axis can be stated.