Regensburg 2022 – scientific programme

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MA: Fachverband Magnetismus

MA 3: Spin-Dependent Phenomena in 2D

MA 3.1: Talk

Monday, September 5, 2022, 09:30–09:45, H43

Noncollinear magnetism in a monolayer of two-dimensional CrTe₂ — •Nihad AbuAwwad^1,2, Manuel dos Santos Dias^2,1, Hazem AbuSara³, 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 — ³Department of Physics, Birzeit University, PO Box 14, Birzeit, Palestine

The discovery of two-dimensional (2D) van der Waals magnets opened unprecedented opportunities for the fundamental exploration of magnetism in quantum materials. 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]. Using first principles, we show that the charge-density waves characterizing a single CrTe₂ give rise to spiral 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. Also, we study the electronic and magnetic properties of heterostructures consisting of a single CrTe₂ monolayer interfaced with either Graphene or hBN.

–Work funded by the Palestinian-German Science Bridge (BMBF–01DH16027) and SPP 2244 (project LO 1659/7-1).

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