SKM 2021 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 1: Surface Magnetism (joint session MA/O)
MA 1.3: Vortrag
Montag, 27. September 2021, 10:45–11:00, H5
Zero-point magnetic exchange interactions — •Juba Bouaziz1,2, Julen Ibañez Azpiroz3, Filipe S. M. Guimarães1, and Samir Lounis1,4 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, Jülich 52425, Germany — 2Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom — 3Centro de Física de Materiales, Universidad del País Vasco/Euskal Herriko Unibertsitatea, 20018 Donostia, San Sebastián, Spain — 4Faculty of Physics, University of Duisburg-Essen, 47053 Duisburg, Germany
Quantum fluctuations are ubiquitous in physics. Their emergence, magnitude and impact on various physical properties is a fascinating research topic of strong implications in nanotechnologies. They impact non-trivially the behaviour of nanostructures. Hinging on the fluctuation-dissipation theorem and the random phase approximation [1], we show that quantum fluctuations play an important role in determining the fundamental magnetic exchange interactions and account for the large overestimation of the magnetic interactions as obtained from conventional static first-principles frameworks, filling in an important gap between theory and experiment. Our analysis further reveals that quantum fluctuations tend to promote the noncollinearity and stability of chiral magnetic textures such as skyrmions. [1] J. Bouaziz et al. PRR 2, 043357 (2020).
This work was supported by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (ERC-consolidator Grant No. 681405, DYNASORE)