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Real-space observation of incommensurate spin density wave and coexisting charge density wave on Cr (001) surface

Author

Listed:
  • Yining Hu

    (Fudan University)

  • Tianzhen Zhang

    (Fudan University)

  • Dongming Zhao

    (Fudan University)

  • Chen Chen

    (Fudan University)

  • Shuyue Ding

    (Fudan University)

  • Wentao Yang

    (Fudan University)

  • Xu Wang

    (Fudan University)

  • Chihao Li

    (Fudan University)

  • Haitao Wang

    (Fudan University)

  • Donglai Feng

    (University of Science and Technology of China
    Collaborative Innovation Center of Advanced Microstructures
    Shanghai Research Center for Quantum Sciences)

  • Tong Zhang

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures
    Shanghai Research Center for Quantum Sciences)

Abstract

In itinerant magnetic systems, a spin density wave (SDW) state can be induced by Fermi surface nesting and electron-electron interaction. It may intertwine with other orders such as charge density wave (CDW), while their relation is still yet to be understood. Here via spin-polarized scanning tunneling microscopy, we directly observed long-range spin modulation on Cr(001) surface, which corresponds to the well-known incommensurate SDW of bulk Cr. It displays 6.0 nm in-plane period and anti-phase behavior between adjacent (001) planes. Meanwhile, we simultaneously observed the coexisting CDW with half the period of SDW. Such SDW/CDW have highly correlated domain structures and are in-phase. Surprisingly, the CDW displays a contrast inversion around a density-of-states dip at −22 meV, indicating an anomalous CDW gap opened below EF. These observations support that the CDW is a secondary order driven by SDW. Our work is not only a real-space characterization of incommensurate SDW, but also provides insights on how SDW and CDW coexist.

Suggested Citation

  • Yining Hu & Tianzhen Zhang & Dongming Zhao & Chen Chen & Shuyue Ding & Wentao Yang & Xu Wang & Chihao Li & Haitao Wang & Donglai Feng & Tong Zhang, 2022. "Real-space observation of incommensurate spin density wave and coexisting charge density wave on Cr (001) surface," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-28104-2
    DOI: 10.1038/s41467-022-28104-2
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    Cited by:

    1. Ziyuan Chen & Dong Li & Zouyouwei Lu & Yue Liu & Jiakang Zhang & Yuanji Li & Ruotong Yin & Mingzhe Li & Tong Zhang & Xiaoli Dong & Ya-Jun Yan & Dong-Lai Feng, 2023. "Charge order driven by multiple-Q spin fluctuations in heavily electron-doped iron selenide superconductors," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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