Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 36: Spin-Dependent 2D Phenomena
MA 36.2: Talk
Wednesday, March 18, 2020, 15:30–15:45, HSZ 101
Strain-induced phase transition in CrI3 bilayers — •Andrea Leon1, J. W. González2, J. Mejía-López3, F. Crasto de Lima4, and E. Suárez Morell2 — 1Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — 2Departamento de Física, Universidad Técnica Federico Santa María, Casilla Postal 110V, Valparaíso, Chile — 3Centro de Investigación en Nanotecnología y Materiales Avanzados CIEN-UC,Facultad de Física, Pontificia Universidad Católica de Chile, CEDENNA, Santiago — 4Instituto de Física, Universidade Federal de Uberlándia, Uberlándia, MG, Brazil
Recent reports on ferromagnetic and antiferromagnetic order in different 2D crystal Van der Waals heterostructures, have opened a vast field of possibilities for new physical phenomena and generation of electronic devices which already started to be explored experimentally. In particular layered CrI3 systems are of great interest due to the staking dependent magnetism, mechanical/magnetic response under pressure, magnetoelectric and optical properties, between others. Motivated by this, the main goal of this work is to search for new electronic properties of antiferromagnetically coupled CrI3 bilayer with C2/m symmetry under strain, using DFT calculations and analytic models. We found that strain may be an efficient tool to tune the magnetic phase of the structure. A tensile strain stabilizes the antiferromagnetic phase, while a compressive strain turns the system ferromagnetic. We understood that behavior by looking at the relative displacement between layers due to the strain. We also study the evolution of the magnetic anisotropy, the magnetic exchange coupling between Cr atoms, and how the Curie temperature is affected by the strain.