...
首页> 外文期刊>Physical review >Density matrix renormalization group study of superconductivity in the triangular lattice Hubbard model
【24h】

Density matrix renormalization group study of superconductivity in the triangular lattice Hubbard model

机译:三角晶格哈伯德模型中超导性的密度矩阵再归一化群研究

获取原文
获取原文并翻译 | 示例
           

摘要

With the discovery of strong-coupling physics and superconductivity in moire superlattices, it is essential to have an understanding of strong-coupling driven superconductivity in systems with trigonal symmetry. The simplest lattice model with trigonal symmetry is the triangular lattice Hubbard model. Although the triangular lattice spin model is a heavily studied model in the context of frustration, studies of the hole-doped triangular lattice Hubbard model are rare. Here, we use density matrix renormalization group to investigate the dominant superconducting channels in the hole-doped triangular lattice Hubbard model over a range of repulsive interaction strengths. We find a clear transition from p-wave superconductivity at a moderate on-site repulsion strength (U/t = 2) at filling above 1/4 (n similar to 0.65) to d-wave superconductivity at a strong on-site repulsion strength (U/t = 10) at filling below 1/4 (n similar to 0.4). The unusual tunability that moire superlattices offer in controlling U/t would open up the opportunity to realize this transition between d-wave and p-wave superconductivity.
机译:随着云纹超晶格中强耦合物理和超导性的发现,必须了解三角对称系统中强耦合驱动的超导性。具有三角对称性的最简单的晶格模型是三角晶格哈伯德模型。尽管三角晶格自旋模型是在挫折的背景下进行了大量研究的模型,但对空穴掺杂的三角晶格哈伯德模型的研究却很少。在这里,我们使用密度矩阵重新归一化组来研究在排斥相互作用强度范围内的掺杂空穴的三角晶格哈伯德模型中的主要超导通道。我们发现从填充超过1/4(n类似于0.65)的中等现场排斥强度(U / t = 2)的p波超导明显过渡到强现场排斥强度的d波超导(U / t = 10)填充低于1/4(n类似于0.4)时。莫尔超晶格在控制U / t中提供的非同寻常的可调谐性将为实现d波和p波超导之间的这种过渡打开机会。

著录项

  • 来源
    《Physical review》 |2019年第6期|60506.1-60506.5|共5页
  • 作者

    Venderley Jordan; Kim Eun-Ah;

  • 作者单位

    Cornell Univ Dept Phys Ithaca NY 14850 USA;

  • 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