...
首页> 外文期刊>Physical review >Universal lowest energy configurations in a classical Heisenberg model describing frustrated systems with wheel geometry
【24h】

Universal lowest energy configurations in a classical Heisenberg model describing frustrated systems with wheel geometry

机译:经典的海森堡模型中的普遍最低能量配置,描述了带有车轮几何形状的受挫系统

获取原文
获取原文并翻译 | 示例
           

摘要

We minimize the energy function of the classical Heisenberg model describing the frustrated wheel shape systems consisting of an odd number of spin vectors, where a single vector is located at the center and the remaining vectors occupy n sites on a ring. Using the Lagrange manifold method developed recently, we find the exact geometrical configurations of the spin vectors corresponding to the global energy minima. We reveal two subsets of collinear n/2 spin vectors which are tilted by an angle. in the opposite direction with respect to that fixed by the central vector. We prove that. does not depend on n and all the spin vectors are collinear, if the system is nonfrustrated or it is subject to weak frustration, otherwise the sublattices start to rotate. In this frustration region, the configurations are double degenerate and differ by chirality. Our findings confirm that the classification of spin frustration holds in the classical limit and allows us to discriminate different regions by the proper configurations. We demonstrate the correspondence between the total spin in the ground state of the quantum model and a component of the net total spin vector which can be exploited in analysis of the quantum models and physical complexes.
机译:我们最小化了经典海森堡模型的能量函数,该模型描述了由奇数个自旋向量组成的沮丧的车轮形状系统,其中单个向量位于中心,其余向量在环上占据n个位置。使用最近开发的拉格朗日流形方法,我们找到了自旋向量的精确几何构型,其与全局能量最小值相对应。我们揭示了倾斜一个角度的共线n / 2自旋向量的两个子集。相对于中心向量固定的方向相反。我们证明了这一点。不依赖于n且所有自旋向量都是共线的,如果系统未受挫或受制于弱受挫,则子晶格开始旋转。在该挫折区域中,构型是双重简并的,并且手性不同。我们的发现证实,自旋挫折的分类在经典范围内成立,并允许我们通过适当的配置来区分不同的区域。我们证明了在量子模型的基态中的总自旋与净总自旋向量的一个分量之间的对应关系,可以在分析量子模型和物理络合物时加以利用。

著录项

  • 来源
    《Physical review》 |2019年第5期|054434.1-054434.13|共13页
  • 作者单位

    Adam Mickiewicz Univ Fac Phys Ul Uniwersytetu Poznanskiego 2 PL-61614 Poznan Poland;

    Poznan Univ Tech Inst Math Ul Piotrowo 3A PL-60965 Poznan Poland;

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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号