Strain and electric-field control of spin-spin interactions in monolayer CrI${}_3$

Abstract

We investigate the impact of mechanical strains and a perpendicular electric field on the electronic and magnetic ground-state properties of two-dimensional monolayer CrI${}_3$ using density functional theory. We propose a minimal spin model Hamiltonian, consisting of symmetric isotropic exchange interactions, magnetic anisotropy energy, and Dzyaloshinskii-Moriya (DM) interactions, to capture most pertinent magnetic properties of the system. We compute the mechanical strain and electric field dependence of various spin-spin interactions. Our results show that both the amplitudes and signs of the exchange interactions can be engineered by means of strain, while the electric field affects only their amplitudes. However, strain and electric fields affect both the directions and amplitudes of the DM vectors. The amplitude of the magnetic anisotropy energy can also be substantially modified by an applied strain. We show that in comparison with an electric field, strain can be more efficiently used to manipulate the magnetic and electronic properties of the system. Notably, such systematic tuning of the spin interactions is essential for the engineering of room-temperature spintronic nanodevices.

arXiv comment9 figures, 11 pages

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• The interplay of Dzyaloshinskii-Moriya and Kitaev interactions for magnonic properties of Heisenberg-Kitaev honeycomb ferromagnets
• Control of magnetic states and spin interactions in bilayer CrCl${}_3$ with strain and electric fields: an ab initio study
• Tunable topological magnon-polaron states and anomalous Hall phenomena in two-dimensional ferromagnetic insulators
• Topological magnon gap engineering in van der Waals CrI${}_3$ ferromagnets
• Magnon Landau levels in the strained antiferromagnetic honeycomb nanoribbons
• Electric-field control of magnetic anisotropies: applications to Kitaev spin liquids and topological spin textures
• Interlayer magnetic interactions in $\pi /3$-twisted bilayer CrI${}_3$
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• Tailoring High-Frequency Magnonics in Monolayer Chromium Trihalides
• Magnon and photon blockade in a hybrid antiferromagnet-cavity quantum system
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• Group Theory Analysis of Phonons in Monolayer Chromium Trihalides and Their Janus Structures
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• A proposal for leaky integrate-and-fire neurons by domain walls in antiferromagnetic insulators
• Magnetoelectricity of Topological Solitons in 2D Magnets
• Angular-Dependent Thermal Hall Effect in a Honeycomb Magnet: Disentangling Kitaev and Dzyaloshinskii-Moriya Interactions