Mode Instability in NaCl Structure under Pressure
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概要
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Mode instability is shown to occur in two models of Nail structure as theapplied pressure increases. One is Kellermann's model which neglects the fieldpolarizability of the ions. In the other, this factor is taken into account alongwith distortion polarizability. In both of them, the transverse acoustic mode inthe symmetric [100] direction becomes unstable; in the forrner, at the T pointand in the latter, at the X point. With further increase of pressure, the longitudinalacoustic [1004 mode becomes unstable at the X point in both cases.
- 社団法人日本物理学会の論文
- 1983-07-15
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