Direct observation of antiferromagnetic parity violation in the electronic structure of Mn 2 Au.
O FedchenkoL ŠmejkalM KallmayerYa LytvynenkoKaterina MedjanikS BabenkovD VasilyevM KläuiJure DemsarG SchönhenseM JourdanJ SinovaHans-Joachim ElmersPublished in: Journal of physics. Condensed matter : an Institute of Physics journal (2022)
Using momentum microscopy with sub- µ m spatial resolution, allowing momentum resolved photoemission on individual antiferromagnetic domains, we observe an asymmetry in the electronic band structure,E(k)≠E(-k), in Mn 2 Au. This broken band structure parity originates from the combined time and parity symmetry,PT, of the antiferromagnetic order of the Mn moments, in connection with spin-orbit coupling. The spin-orbit interaction couples the broken parity to the Néel order parameter direction. We demonstrate a novel tool to image the Néel vector direction, N , by combining spatially resolved momentum microscopy with ab-initio calculations that correlate the broken parity with the vector N .
Keyphrases
- room temperature
- single molecule
- transition metal
- density functional theory
- high resolution
- sensitive detection
- high speed
- optical coherence tomography
- molecular dynamics
- reduced graphene oxide
- ionic liquid
- molecular dynamics simulations
- mass spectrometry
- gold nanoparticles
- machine learning
- quantum dots
- single cell