SKM 2021 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 4: Spin-Dependent 2D Phenomena

MA 4.4: Vortrag

Dienstag, 28. September 2021, 11:00–11:15, H5

Charge density waves as enablers for chiral magnetism in two-dimensional CrTe₂ — •Nihad AbuAwwad^1,2, Manuel dos Santos Dias¹, Sascha Brinker¹, and Samir Lounis^1,2 — ¹Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, 52425 Jülich, Germany — ²Faculty of Physics, University of Duisburg-Essen, 47053 Duisburg, Germany

The discovery of two-dimensional (2D) van der Waals magnets opened unprecedented opportunities for the fundamental exploration of magnetism in quantum materials and the realization of next generation spintronic devices. Recently, thin CrTe₂ films were demonstrated to be ferromagnetic up to room temperature, with an intriguing dependence of the easy axis on the thickness of the material [1,2]. Here, we demonstrate using first-principles that the charge-density waves characterizing a single CrTe₂ give rise to chiral magnetism through the emergence of the Dzyaloshinskii-Moriya interaction (DMI). Utilizing atomistic spin dynamics, we perform a detailed investigation of the complex magnetic properties pertaining to this 2D material impacted by the presence of various types of charge density waves.

–Work funded by the Palestinian-German Science Bridge (BMBF–01DH16027) and Priority Programme SPP 2244 2D Materials Physics of van der Waals Heterostructures of the DFG (project LO 1659/7-1).

[1] Zhang et al., Nat. Commun. 12, 2492 (2021); [2] Meng et al., Nat. Commun. 12, 809 (2021).