Regensburg 2025 – scientific programme

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O: Fachverband Oberflächenphysik

O 51: Poster Electronic Structure of Surfaces: Spectroscopy, Surface States

O 51.5: Poster

Tuesday, March 18, 2025, 18:00–20:00, P2

The CD-ARPES study of intercalated transition metal dichalcogenide V1/3NbS2 — •Jyoti Kaswan¹, Laurent Nicolaï¹, Raphaël Salazar¹, Aki Ismo Olavi Pulkkinen¹, Sunil W Dsouza¹, Zdeněk Sofer², and Jan Minár¹ — ¹University of West Bohemia, Plzeň, Czech Republic — ²University of chemistry and technology Prague, Czech Republic

Intercalated transition metal dichalcogenides (TMDCs) have recently garnered significant attention from the condensed matter community due to the demonstration of exotic phenomena that depend on the intercalated transition metal [1]. We investigate the electronic structure of V-intercalated TMDC, V1/3NbS2, using Circular Dichroic Angle-Resolved Photoemission Spectroscopy (CD-ARPES) in combination with the one-step model of photoemission as implemented in the SPR-KKR package [2].The intensity asymmetry in CD contains a well-known dichroism component related to the measurement geometry, as well as a component associated with magnetic ordering, complicating the extraction of spin information from CD-ARPES data. To address this challenge, our group has developed a model of dichroism based on the one-step model of photoemission (SPR-KKR code). By incorporating the measurement geometry, the ab initio calculations enable the separation of geometric and spin contributions to the CD signal [3,4]. [1] B. Edwards et al, Nature Materials 22, 459*465 (2023). [2] H. Ebert, D. Ködderitzsch and J. Minár, Rep. on Prog. in Phys. 74, 096501 (2011) [3] O. Fedchenko et al., Sci. Adv. 10, eadj4883 (2024) [4] S. Beaulieu et al, Phys. Rev. Lett. 125, 216404 (2020)

Keywords: Intercalated transition metal dichalcogenide; electronic structure; CD-ARPES; SPR-KKR