MICROSCOPIC THEORY OF ORIENTATIONAL DISORDER AND THE ORIENTATIONAL PHASE-TRANSITION IN SOLID C-60

被引:96
作者
MICHEL, KH [1 ]
COPLEY, JRD [1 ]
NEUMANN, DA [1 ]
机构
[1] NATL INST STAND & TECHNOL,MAT SCI & ENGN LAB,GAITHERSBURG,MD 20899
关键词
D O I
10.1103/PhysRevLett.68.2929
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have developed a microscopic theory which describes the orientational dynamics of C60 molecules in the face-centered-cubic phase of C60 fullerite. The molecular interaction potential and the crystal-field potential are formulated in terms of symmetry-adapted rotator functions. The phase transition to the Pa3BAR structure is driven by an active multipolar mode of T2g symmetry belonging to the l = 10 manifold. The Birman criterion is satisfied. The transition is found to be of first order.
引用
收藏
页码:2929 / 2932
页数:4
相关论文
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