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Local magnetic properties of L × L square lattice with an Extended Hubbard Model

机译：扩展哈伯德模型的L×L方格的局部磁性能

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摘要

Within an analytical diagonalization, it is possible to exactly solve a large class of models useful for the study of strongly correlated electrons systems. Here, we perform an exact diagonalization of the two-dimensional Extended Hubbard Model with first nearest neighbor repulsive V and spin-spin interaction J at one-eight filling. The analysis of the ground state energy and spin gap behaviors as a function of V and J terms allows us to study some local magnetic properties of 2D ferromagnetic correlated electrons system distributed in finite square lattice. The obtained results show the existence of competition between Spin Density Wave and Charge Density Wave with the possibility to have a phase transition between these two waves at a critical value V_c.
机译：在分析对角化过程中，可以精确地求解一类用于研究强相关电子系统的模型。在这里，我们执行二维扩展哈伯德模型的精确对角化，其中第一近邻排斥V和自旋-自旋相互作用J为八分之一填充。对基态能量和自旋间隙行为作为V和J项的函数的分析，使我们能够研究分布在有限方格子中的二维铁磁相关电子系统的局部磁性能。所获得的结果表明自旋密度波和电荷密度波之间存在竞争，并且有可能在临界值V_c处在这两个波之间产生相变。

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  • 来源
    《Optical and quantum electronics》 |2015年第3期|523-528|共6页
  • 作者

    A. Zouhair; S. Harir; M. Bennai; A. Migalska-Zalas; Y. Boughaleb;

  • 作者单位

    Laboratory of Condensed Matter Physics (URAC10), Faculty of Science Ben M'Sik, University Hassan Ⅱ-Mohammedia Casablanca, Casablanca, Morocco;

    Laboratory of Condensed Matter Physics (URAC10), Faculty of Science Ben M'Sik, University Hassan Ⅱ-Mohammedia Casablanca, Casablanca, Morocco,Departement de Physique-Chimie, Centre Regional des Metiers de l'Education et de la Formation, Settat, Morocco;

    Laboratory of Condensed Matter Physics (URAC10), Faculty of Science Ben M'Sik, University Hassan Ⅱ-Mohammedia Casablanca, Casablanca, Morocco;

    Institute of Physics, Jan Dlugosz University, Armii Krajowej 13/15, Czestochowa, Poland;

    Laboratory of Condensed Matter Physics (URAC10), Faculty of Science Ben M'Sik, University Hassan Ⅱ-Mohammedia Casablanca, Casablanca, Morocco,Ecole Normale Superieure, Universite Hassan Ⅱ, Casablanca, Morocco,Hassan Ⅱ Academy of Science and Technology, Rabat, Morocco;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Extended Hubbard Model; Exact diagonalization; Square lattice;

    机译：扩展Hubbard模型;精确的对角化;方格;

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