One-Dimensional Quasicrystals from Incommensurate Charge Order.
One-Dimensional Quasicrystals from Incommensurate Charge Order.
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来自不相称电荷顺序的一维准晶体。
DOI：
10.1103/physrevlett.115.236401
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发表时间：
2015
影响因子：
8.6
通讯作者：
J. van Wezel
中科院分区：
文献类型：
--
作者：
F. Flicker;J. van Wezel
人造准晶体现在是常规制造的，但只有两个天然存在的例子是已知的。我们提出了一类系统的潜在实现人工和自然界中，其中最低的能量状态是一个一维准晶。这些系统是基于不对称的电荷有序材料，其中准晶相与形成规则的歧化阵列竞争，作为高温下的不相称电荷有序和低温下的相称有序之间的内插方式。准晶态的非局域相关特性来自于局域在倒易空间中的自由能贡献。我们提出了一个理论相图表明，这样的基态的外观所需的材料特性允许一维准晶形成在真实的材料。结果是一个潜在的广泛的一维准晶类。
Artificial quasicrystals are nowadays routinely manufactured, yet only two naturally occurring examples are known. We present a class of systems with the potential to be realized both artificially and in nature, in which the lowest energy state is a one-dimensional quasicrystal. These systems are based on incommensurately charge-ordered materials, in which the quasicrystalline phase competes with the formation of a regular array of discommensurations as a way of interpolating between incommensurate charge order at high temperatures and commensurate order at low temperatures. The nonlocal correlations characteristic of the quasicrystalline state emerge from a free-energy contribution localized in reciprocal space. We present a theoretical phase diagram showing that the required material properties for the appearance of such a ground state allow for one-dimensional quasicrystals to form in real materials. The result is a potentially wide class of one-dimensional quasicrystals.