Visualizing the out-of-plane electronic dispersions in an intercalated transition metal dichalcogenide

DOI: 10.1103/PhysRevB.105.L121107

Authors: Xian P. Yang (Princeton University) , Harrison Labollita (Arizona State University) , Zi-Jia Cheng (Princeton University) , Hari Bhandari (George Mason University) , Tyler A. Cochran (Princeton University) , Jia-Xin Yin (Princeton University) , Md. Shafayat Hossain (Princeton University) , Ilya Belopolski (Princeton University) , Qi Zhang (Princeton University) , Yuxiao Jiang (Princeton University) , Nana Shumiya (Princeton University) , Daniel Multer (Princeton University) , Maksim Liskevich (Princeton University) , Dmitry A. Usanov (Swiss Light Source) , Yanliu Dang (National Institute of Standards and Technology (NIST); Purdue University) , Vladimir N. Strocov (Swiss Light Source) , Albert V. Davydov (National Institute of Standards and Technology (NIST)) , Nirmal J. Ghimire (George Mason University) , Antia S. Botana (Arizona State University) , M. Zahid Hasan (Princeton University; Lawrence Berkeley National Laboratory)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 105

State: Published (Approved)
Published: March 2022
Diamond Proposal Number(s): 29230

Abstract: Layered transition metal dichalcogenides have a rich phase diagram and they feature two-dimensionality in numerous physical properties. Co 1 / 3 NbS 2 is one of the newest members of this family where Co atoms are intercalated into the van der Waals gaps between NbS 2 layers. We study the three-dimensional electronic band structure of Co 1 / 3 NbS 2 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, Co 1 / 3 NbS 2 displays a different orbital character near the Fermi level compared to the pristine NbS 2 compound and has a clear band dispersion in the k z 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.

Journal Keywords: Anomalous Hall effect; Antiferromagnetism; Atomic orbital; Transition metal dichalcogenides; Angle-resolved photoemission spectroscopy; First-principles calculations; Topology

Diamond Keywords: Antiferromagnetism

Subject Areas: Materials, Physics


Instruments: I05-ARPES

Other Facilities: Bloch at MAX IV; ADRESS at Swiss Light Source

Added On: 17/03/2022 10:20

Discipline Tags:

Superconductors Quantum Materials Physics Hard condensed matter - structures Magnetism Materials Science

Technical Tags:

Spectroscopy Angle Resolved Photoemission Spectroscopy (ARPES)