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首页> 外文期刊>Physical review >Superlattice pseudouniform orderings as modulated structures: Stripe and checkerboard arrangements
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Superlattice pseudouniform orderings as modulated structures: Stripe and checkerboard arrangements

机译：超晶格伪均匀排序为调制结构：条纹和棋盘格布置

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摘要

Uniform ordered configurations of minority motifs in a two-dimensional square lattice are investigated as a function of composition. The problem of their general classification is reconsidered using as complementary guiding principles the main features of the simpler problem in one dimension: an effective repulsive interaction and the concatenation or intergrowth of basic supercells. It is seen that a large class of pseudouniform orderings have a quasi-one-dimensional character, either as a direct juxtaposition of stripes of basic supercells or as decimated checkerboard arrangements with similar underlying uniformity. The description of these arrangements as occupational modulated structures using the superspace formalism proves to be especially simple and affords a direct and practical connection between the main features of the Fourier spectrum of the system and the underlying ordering. This framework is both descriptive and predictive, and generalizes the methodology already applied successfully to flexible-composition compounds exhibiting one-dimensional orderings. It confirms the general observation that uniformity or maximal segregation in real space corresponds to maximally compact motifs in the superspace description.
机译：二维方格中少数图案的均匀有序配置作为成分的函数进行了研究。作为补充性指导原则，重新考虑了其一般分类的问题，其中一个较为简单的问题的主要特征在一个维度上：有效的排斥相互作用和基本超单元的串联或共生。可以看出，一大类伪均匀排序具有准一维特征，既可以作为基本超级单元条带的直接并置，也可以作为具有相似底层均匀性的抽取的棋盘格布置。使用超空间形式主义将这些布置描述为职业调制结构被证明是特别简单的，并且在系统的傅立叶谱的主要特征和潜在的排序之间提供了直接和实际的联系。该框架具有描述性和预测性，并概括了已成功应用于显示一维排序的柔性成分化合物的方法。它证实了一般的观察，即真实空间中的均匀性或最大隔离度对应于超空间描述中的最大紧凑主题。

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  • 来源
    《Physical review》 |2011年第18期|p.184106.1-184106.16|共16页
  • 作者

    Santiago Gonzalez; J. M. Perez-Mato; Luis Elcoro; Alberto Garcia;

  • 作者单位

    Departamento de Fisica de la Materia Condensada, Facultad de Ciencia y Tecnologia, Universidad del Pais Vasco (UPV-EHU),Apartado 644, E-48080 Bilbao, Spain;

    Departamento de Fisica de la Materia Condensada, Facultad de Ciencia y Tecnologia, Universidad del Pais Vasco (UPV-EHU),Apartado 644, E-48080 Bilbao, Spain;

    Departamento de Fisica de la Materia Condensada, Facultad de Ciencia y Tecnologia, Universidad del Pais Vasco (UPV-EHU),Apartado 644, E-48080 Bilbao, Spain;

    Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, E-08193 Bellaterra, Spain;

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  • 正文语种 eng
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  • 关键词

    crystal stoichiometry; incommensurate crystals;

    机译：晶体化学计量不相称的晶体;

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