中国物理B ›› 2023, Vol. 32 ›› Issue (5): 57304-057304.doi: 10.1088/1674-1056/acbc6b

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Density-wave tendency from a topological nodal-line perspective

Tianlun Zhao(赵天伦) and Yi Zhang(张亿)   

  1. International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
  • 收稿日期:2022-09-06 修回日期:2022-11-11 接受日期:2023-02-16 出版日期:2023-04-21 发布日期:2023-05-09
  • 通讯作者: Yi Zhang E-mail:frankzhangyi@pku.edu.cn
  • 基金资助:
    We thank Xin-Chi Zhou and Di-Zhao Zhu for insightful discussions. Project supported by the National Key Research and Development Program of China (Grant No. 2022YFA1403700) and the National Natural Science Foundation of China (Grant Nos. 12174008 and 92270102). The calculations of this work are supported by the HPC facilities at Peking University.

Density-wave tendency from a topological nodal-line perspective

Tianlun Zhao(赵天伦) and Yi Zhang(张亿)   

  1. International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
  • Received:2022-09-06 Revised:2022-11-11 Accepted:2023-02-16 Online:2023-04-21 Published:2023-05-09
  • Contact: Yi Zhang E-mail:frankzhangyi@pku.edu.cn
  • Supported by:
    We thank Xin-Chi Zhou and Di-Zhao Zhu for insightful discussions. Project supported by the National Key Research and Development Program of China (Grant No. 2022YFA1403700) and the National Natural Science Foundation of China (Grant Nos. 12174008 and 92270102). The calculations of this work are supported by the HPC facilities at Peking University.

摘要: The understanding of density waves is a vital component of our insight into electronic quantum matters. Here, we propose an additional mosaic to the existing mechanisms such as Fermi-surface nesting, electron-phonon coupling, and exciton condensation. In particular, we find that certain two-dimensional (2D) spin density-wave systems are equivalent to three-dimensional (3D) Dirac nodal-line systems in the presence of a magnetic field, whose electronic structure takes the form of Dirac-fermion Landau levels and allows a straightforward analysis of its optimal filling. The subsequent minimum-energy wave vector varies over a continuous range and shows no direct connection to the original Fermi surfaces in 2D. Also, we carry out numerical calculations where the results on model examples support our theory. Our study points out that we have yet to attain a complete understanding of the emergent density wave formalism.

关键词: density waves, Dirac nodal-line, optimal wave vector

Abstract: The understanding of density waves is a vital component of our insight into electronic quantum matters. Here, we propose an additional mosaic to the existing mechanisms such as Fermi-surface nesting, electron-phonon coupling, and exciton condensation. In particular, we find that certain two-dimensional (2D) spin density-wave systems are equivalent to three-dimensional (3D) Dirac nodal-line systems in the presence of a magnetic field, whose electronic structure takes the form of Dirac-fermion Landau levels and allows a straightforward analysis of its optimal filling. The subsequent minimum-energy wave vector varies over a continuous range and shows no direct connection to the original Fermi surfaces in 2D. Also, we carry out numerical calculations where the results on model examples support our theory. Our study points out that we have yet to attain a complete understanding of the emergent density wave formalism.

Key words: density waves, Dirac nodal-line, optimal wave vector

中图分类号:  (Electrical properties of specific thin films)

  • 73.61.-r
71.70.Di (Landau levels)