...
首页> 外文期刊>Physical review >Ferromagnetic instability for the single-band Hubbard model in the strong-coupling regime
【24h】

Ferromagnetic instability for the single-band Hubbard model in the strong-coupling regime

机译:强耦合状态下单频带Hubbard模型的铁磁不稳定性

获取原文
获取原文并翻译 | 示例
           

摘要

We study a ferromagnetic instability in a doped single-band Hubbard model by means of dynamical mean-field theory with the continuous-time quantum Monte Carlo simulations. Examining the effect of the strong correlations in the system on the hypercubic and Bethe lattice, we find that the ferromagnetically ordered state appears in the former, while it does not in the latter. We also reveal that the ferromagnetic order is more stable in the case that the noninteracting density of states (DOS) exhibits a slower decay in the high-energy region. The present results suggest that, in the strong-coupling regime, the high-energy part of DOS plays an essential role for the emergence of the ferromagnetically ordered state, in contrast to the Stoner criterion justified in the weak-interaction limit.
机译:我们利用动态平均场理论和连续时间量子蒙特卡洛模拟研究了掺杂的单波段哈伯德模型中的铁磁不稳定性。检查系统中强相关性对高立方和Bethe晶格的影响,我们发现铁磁有序状态出现在前者中,而没有出现在后者中。我们还揭示出,在态的非相互作用密度(DOS)在高能区域中表现出较慢的衰减的情况下,铁磁顺序更加稳定。目前的结果表明,在强耦合状态下,DOS的高能部分对于铁磁有序状态的出现起着至关重要的作用,这与弱相互作用极限中证明的斯托纳准则相反。

著录项

  • 来源
    《Physical review》 |2019年第23期|235107.1-235107.6|共6页
  • 作者单位

    Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan;

    Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan|Yokohama Natl Univ, Dept Phys, 79-5 Tokiwadai, Yokohama, Kanagawa 2408501, Japan;

    Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan;

  • 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