QUASICRYSTALS - A NEW CLASS OF ORDERED STRUCTURES
QUASICRYSTALS - A NEW CLASS OF ORDERED STRUCTURES
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DOI：
10.1103/physrevlett.53.2477
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发表时间：
1984-01-01
影响因子：
8.6
通讯作者：
STEINHARDT, PJ
中科院分区：
文献类型：
--
作者：
LEVINE, D;STEINHARDT, PJ
准晶体是晶体概念的自然延伸，其结构具有准周期性，而不是周期性的平移顺序。我们分类的二维和三维准晶的对称性下旋转，并表明，许多不允许的晶体对称性允许准晶对称性。我们分析计算了一个理想准晶的衍射花样，并表明最近观察到的Al-Mn合金的电子衍射花样是密切相关的二十面体准晶。
A quasicrystal is the natural extension of the notion of a crystal to structures with quasiperiodic, rather than periodic, translational order. We classify two-and three-dimensional quasicrystals by their symmetry under rotation and show that many disallowed crystal symmetries are allowed quasicrystal symmetries. We analytically compute the diffraction pattern of an ideal quasicrystal and show that the recently observed electron-diffraction pattern of an Al-Mn alloy is closely related to that of an icosahedral quasicrystal.