1. Visualizing the out-of-plane electronic dispersions in an intercalated transition metal dichalcogenide
- Author
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Yang, XP, Yang, XP, Labollita, H, Cheng, ZJ, Bhandari, H, Cochran, TA, Yin, JX, Hossain, MS, Belopolski, I, Zhang, Q, Jiang, Y, Shumiya, N, Multer, D, Liskevich, M, Usanov, DA, Dang, Y, Strocov, VN, Davydov, AV, Ghimire, NJ, Botana, AS, Hasan, MZ, Yang, XP, Yang, XP, Labollita, H, Cheng, ZJ, Bhandari, H, Cochran, TA, Yin, JX, Hossain, MS, Belopolski, I, Zhang, Q, Jiang, Y, Shumiya, N, Multer, D, Liskevich, M, Usanov, DA, Dang, Y, Strocov, VN, Davydov, AV, Ghimire, NJ, Botana, AS, and Hasan, MZ
- Abstract
Layered transition metal dichalcogenides have a rich phase diagram and they feature two-dimensionality in numerous physical properties. Co1/3NbS2 is one of the newest members of this family where Co atoms are intercalated into the van der Waals gaps between NbS2 layers. We study the three-dimensional electronic band structure of Co1/3NbS2 using both surface and bulk sensitive angle-resolved photoemission spectroscopy. We show that the electronic bands do not fit into the rigid band shift picture after the Co intercalation. Instead, Co1/3NbS2 displays a different orbital character near the Fermi level compared to the pristine NbS2 compound and has a clear band dispersion in the kz direction despite its layered structure. Our photoemission study demonstrates the out-of-plane electronic correlations introduced by the Co intercalation, thus offering a different perspective on this compound. Finally, we propose how Fermi level tuning could lead to exotic phases such as spin density wave instability.
- Published
- 2022