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arXiv 1611.07510cond-mat.mtrl-sci
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一种基于密度泛函理论计算的具有涌现结构的层状材料预测方法

A Density Functional Theory Calculations-Based Approach that Predicts Layered Materials with Emergent Structures

Sven P. Rudin

摘要:

最近的工作表明,密度泛函理论计算准确地描述了表现出无公度组分层之间的乱层无序的材料。这些计算将其中一种组分近似为另一种组分的连续层之间的有限岛。这种岛近似允许对交错层之间的所有相对角度进行同等处理,并且它消除了与两个层相称的单位单元的要求。这里提出的工作使用这种近似来寻找新的层状材料,表现出乱层无序和磁结构。在第一应用中,该方法找到最近合成的SnSe $_2$ -VSe $_2$系统。该方法预测了一个稳定的Fe $_3$ Ge-VSe $_2$结构和多个稳定的结构,交错Mn $_x$ Se $_y$层与VSe $_2$层。这些Mn $_x$ Se $_y$层表现出涌现的结构和稳定性。

英文摘要:

Recent work shows that density functional theory calculations accurately describe materials exhibiting turbostratic disorder between layers of incommensurate constituents. These calculations approximate one of the constituents as a finite island between continuous layers of the other constituent. This island approximation allows equal treatment of all relative angles between the interleaved layers, and it removes the requirement of a unit cell that is commensurate with both layers. The work presented here uses this approximation to search for new layered materials that exhibit turbostratic disorder and magnetic structure. In a first application, the approach finds the recently synthesized SnSe$_2$-VSe$_2$ system. The approach predicts a stable Fe$_3$Ge-VSe$_2$ structure and multiple stable structures that interleave Mn$_x$Se$_y$ layers with VSe$_2$ layers. These Mn$_x$Se$_y$ layers exhibit emergent structures and stability.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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