1. Electronic states of domain walls in commensurate charge density wave ground state and mosaic phase in 1T-TaS2
- Author
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Yan Li, Yao Xiao, Qi Zheng, Xiao Lin, Li Huang, and Hong-Jun Gao
- Subjects
General Physics and Astronomy - Abstract
Domain walls (DWs) in the charge-density-wave (CDW) Mott insulator 1T-TaS2 have unique localized states, which play an important role in exploring the electronic properties of the material. However, the electronic states in DWs in 1T-TaS2 have not been clearly understood, mostly due to the complex structures, phases, and interlayer stacking orders in the DW areas. Here, we explored the electronic states of DWs in large-area CDW phase and mosaic phase of 1T-TaS2 by scanning tunneling spectroscopy. Due to the different density of DWs, the electronic states of DWs show distinct features in these phases. In large area CDW phase, both the domain and the DWs (DW1, DW2, DW4) have zero conductance at the Fermi level; while in mosaic phase, they can be metallic or insulating depending on their environments. In areas with high density of DWs, some electronic states were observed both on the DWs and within the domains, indication delocalized states over the whole region. Our work contributes to further understandings on the interplay between CDW and electron correlations in 1T-TaS2.
- Published
- 2023