| Autor: |
Matthew D. Watson, Swagata Acharya, James E. Nunn, Laxman Nagireddy, Dimitar Pashov, Malte Rösner, Mark van Schilfgaarde, Neil R. Wilson, Cephise Cacho |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
npj 2D Materials and Applications, Vol 8, Iss 1, Pp 1-8 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2397-7132 |
| DOI: |
10.1038/s41699-024-00492-7 |
| Popis: |
Abstract We present the evolution of the electronic structure of CrSBr from its antiferromagnetic ground state to the paramagnetic phase above T N = 132 K, in both experiment and theory. Low-temperature angle-resolved photoemission spectroscopy (ARPES) results are obtained using a novel method to overcome sample charging issues, revealing quasi-2D valence bands in the ground state. The results are very well reproduced by our $${\rm{QSG}}\hat{{\rm{W}}}$$ QSG W ̂ calculations, which further identify certain bands at the X points to be exchange-split pairs of states with mainly Br and S character. By tracing band positions as a function of temperature, we show the splitting disappears above T N . The energy splitting is interpreted as an effective exchange splitting in individual layers in which the Cr moments all align, within the so-called A-type antiferromagnetic arrangement. Our results lay firm foundations for the interpretation of the many other intriguing physical and optical properties of CrSBr. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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