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Visualization of Alternating Triangular Domains of Charge Density Waves in 2H-NbSe2 by Scanning Tunneling Microscopy
The charge density wave (CDW) state of 2H-NbSe2 features commensurate domains separated by domain boundaries accompanied by phase slips known as discommensurations. We have unambiguously visualized the structure of CDW domains using a displacement-field measurement algorithm on a scanning tunneling microscopy image. Each CDW domain is delimited by three vertices and three edges of discommensurations and is designated by a triplet of integers whose sum identifies the types of commensurate structure. The observed structure is consistent with the alternating triangular tiling pattern predicted by a phenomenological Landau theory. The domain shape is affected by crystal defects and also by topological defects in the CDW phase factor. Our results provide a foundation for a complete understanding of the CDW state and its relation to the superconducting state.
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- 29/01/2024
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Shunsuke Yoshizawa et al. - Phys. Rev. Lett. 132, 056401 (2024) Supplemental Material.pdf | 10.5 MB | MDR Open |
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Shunsuke Yoshizawa et al. - Phys. Rev. Lett. 132, 056401 (2024) Visualization of Alternating Triangular Domains of Charge Density Waves in 2H-NbSe2 by Scanning Tunneling Microscopy.pdf | 2.54 MB | MDR Open |
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