ORDER, FRUSTRATION, AND DEFECTS IN LIQUIDS AND GLASSES
ORDER, FRUSTRATION, AND DEFECTS IN LIQUIDS AND GLASSES
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DOI：
10.1103/physrevb.28.5515
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发表时间：
1983-01-01
影响因子：
3.7
通讯作者：
NELSON, DR
中科院分区：
文献类型：
--
作者：
NELSON, DR
发展了液体和金属玻璃的缺陷描述。在二维中，常负曲率的表面包含一个不可约的六角序参数的点向错密度。在三维平面空间中，二十面体序参量中出现类似的缺陷线。四面体粒子填充中的挫折迫使向错线进入介质，这让人想起II型超导体中的Abrikosov通量线和均匀挫折的自旋玻璃。缺陷密度由各向同性曲率失配决定，并且由此产生的奇异线在所有方向上运行。过渡金属合金的Frank-Kasper相是这些线的有序网络，当它们无序时，为金属玻璃的结构提供了一个吸引人的模型。
A defect description of liquids and metallic glasses is developed. In two dimensions, surfaces of constant negative curvature contain an irreducible density of point disclinations in a hexatic order parameter. Analogous defect lines in an icosahedral order parameter appear in three-dimensional flat space. Frustration in tetrahedral particle packings forces disclination lines into the medium in a way reminiscent of Abrikosov flux lines in a type-II superconductor and of uniformly frustrated spin-glasses. The defect density is determined by an isotropic curvature mismatch, and the resulting singular lines run in all directions. The Frank-Kasper phases of transition-metal alloys are ordered networks of these lines, which, when disordered, provide an appealing model for structure in metallic glasses.