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Two-dimensional Coulomb solid with interaction anisotropy

机译:具有相互作用各向异性的二维库仑固体

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摘要

Low-dimensional systems of interacting particles demonstrate a variety of fascinating macroscopic properties. Experimentally investigated examples include two-dimensional electron systems in semiconductors structures and Abrikosov vortex lattices in superconductors; these systems share notable features in common, such as low-symmetry host, crystal interactions. These interactions can be described in terms of a general statistical model: as systems driven by Coulombic forces and anisotropic bond energy. Through molecular-dynamics simulation we find that the expected hexagonal order disappears even for a weak tetragonal anisotropy, giving rise to a tetragonal structure with a finite-length ordering allowing for determination of the critical anisotropy parameter for the phase transition.
机译:相互作用粒子的低维系统表现出各种引人入胜的宏观特性。实验研究的例子包括半导体结构中的二维电子系统和超导体中的Abrikosov涡旋晶格。这些系统具有共同的显着特征,例如低对称主体,晶体相互作用。这些相互作用可以用一般的统计模型来描述:作为由库仑力和各向异性键能驱动的系统。通过分子动力学模拟,我们发现,即使对于较弱的四方各向异性,预期的六边形顺序也会消失,从而形成具有有限长度顺序的四方结构,从而可以确定相变的临界各向异性参数。

著录项

  • 来源
    《Physical review》 |2010年第15期|153307.1-153307.4|共4页
  • 作者单位

    Departamento de Fisica, Universidade Federal de Sao Carlos, 13.565-905 Sao Carlos, SP, Brazil;

    rnDepartamento de Fisica, Universidade Federal de Sao Carlos, 13.565-905 Sao Carlos, SP, Brazil;

    rnDepartamento de Fisica, Universidade Federal de Sao Carlos, 13.565-905 Sao Carlos, SP, Brazil Applied Physics Department, The University of Michigan, Ann Arbor, Michigan 48109-1040, USA;

    rnDepartamento de Quimica Fisica, Universidad del Pals Vasco-Euskal Herriko Unibertsitatea, 48080 Bilbao, Spain IKERBASQUE Basque Foundation for Science, Alameda Urquijo 36-5, 48011 Bilbao, Bizkaia, Spain;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    electron solids; molecular dynamics and particle methods;

    机译:电子固体分子动力学和粒子方法;

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