Phase transitions in K2ZnCl4.
نویسندگان
چکیده
It is shown that the potential-energy surface in K2ZnCl4 contains a double-well structure, very similar to some of the other A2BX4 compounds (e.g., K2SeO4, Rb2ZnCl4), except that the double well is much deeper and broader, giving rise to a highly disordered high-temperature phase as observed experimentally. A lattice-dynamics study of the Pna21 structure shows an instability with the wave vector q=0.5b+(0.5±δ)c, providing an explanation to the incommensurate phase transition reported recently. ©1992 The American Physical Society URL: http://link.aps.org/doi/10.1103/PhysRevB.46.8582 DOI: 10.1103/PhysRevB.46.8582 PHYSICAL REVIEW B VOLUME 46, NUMBER 13 1 OCTOBER 1992-1
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عنوان ژورنال:
- Physical review. B, Condensed matter
دوره 46 13 شماره
صفحات -
تاریخ انتشار 1992