Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 43: Magnetic Semiconductors, Magnetization Dynamics and Damping
MA 43.3: Vortrag
Donnerstag, 21. März 2024, 15:30–15:45, EB 202
Electronic structure of bulk and ultrathin CrSBr: an ARPES study — •Marco Bianchi1, Swagata Acharya2,3, Florian Dirnberger4, Julian Klein5, Kimberly Hsieh1, Esben J. Porat1, Dimitar Pashov6, Kseniia Mosina7, Zdenek Sofer7, Alexander Rudenko3, Mikhail I. Katsnelson3, Mark van Schilfgaarde6,2, Yong P. Chen1,8, Malte Rösner3, and Philip Hofmann1 — 1Dep. of Phys. & Astro., ISA, iNANO, Aarhus Univ., DK — 2National Renewable Energy Labb., Golden, CO, USA — 3Inst. for Molecules & Matt., Radboud Univ., Nijmegen, NL — 4Inst. App. Phys. & ct.qmat, Tech. Univ. Dresden, DE — 5Dep. Matt. Sci. & Eng., MIT, Cambridge, MA, USA — 6Kings College, Theory & Simulation of Cond. Mat., London, UK — 7Dep. Inorganic Chem., Univ. of Chem. & Tech., Prague, CZ — 8Dep. of Phys. & Astro., Purdue Quantum Sci. & Eng. Inst., Purdue Univ., West Lafayette, IN, USA
We explore the electronic structure of paramagnetic bulk and ultrathin flakes of CrSBr, exfoliated in situ on Au(111) and Ag(111) using angle-resolved photoemission spectroscopy. The observed band structure in the two cases is drastically different: While the bulk charges up at temperatures lower than 200 K and requires ab-intio GW calculation to be interpreted, the ultrathin flakes can be measured down to 35 K, are n-doped and well described by DFT calculations if local Coulomb interactions are taken into account.
Keywords: ARPES; 2D magnets; thin films; in-situ exfoliation; magnetic symmetry breaking