Regensburg 2022 – wissenschaftliches Programm
MA 17.3: Hauptvortrag
Dienstag, 6. September 2022, 16:00–16:30, H43
An electronic structure viewpoint on candidate van der Waals ferromagnets — •Phil King1, Matt Watson1, Brendan Edwards1, Akhil Rajan1, Jiagui Feng1, Deep Biswas1, Monica Ciomaga Hatnean2, Amelia Hall2, Geetha Balakrishnan2, Giovani Vinai3, David Burn4, Thorsten Hesjedal5, Gerrit van der Laan4, Oliver Dowinton6, and Saeed Bahramy6 — 1Univ. St Andrews — 2Univ. Warwick — 3Elettra synchrotron — 4Diamond Light Source — 5Univ. Oxford — 6Univ. Manchester
Control over materials thickness down to the single-atom scale has emerged as a powerful tuning parameter for manipulating both single-particle band structures and collective states of solids. Magnetism is a new frontier in the study of 2d materials. Here, I will show how direct measurement of the electronic structure using angle- resolved photoemission (ARPES) can lead to valuable insight not only into whether a 2d material exhibits long-range magnetic order, but also on its microscopic mechanisms. I will consider monolayer VSe2, where a putative magnetic order is destabilised by the formation of a robust charge density wave,1,2 but can be re-established via proximity coupling;3 V1/3NbS2, where proximity coupling to the surface layer can lead to a modulation of spin-valley locking, and CrGeTe3, an established van der Waals ferromagnet, where band structure measurements provide important microscopic insights even in a local moment system.4 1Rajan et al., Phys. Rev. Materials 4 (2020) 014003; 2Feng et al., Nano Lett. 18 (2018) 4493; 3Vinai et al., Phys. Rev. B 101 (2020) 035404 ; 4Watson et al., Phys. Rev. B 101 (2020) 205125.