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Coulomb-Engineered Magnetism in CrI<sub>3</sub> Monolayers

ORAL

Abstract

The electronic band structure and the magnetic properties of two-dimensional magnets are decisively controlled by the Coulomb interaction between carriers within the layered material. At the same time we can externally modify this interaction by means of dielectric substrates or dielectric coating. This allows for an external manipulation of internal static and dynamic magnetic properties.

Here we use a combination of the Magnetic-Force theorem and state-of-the-art ab-initio down-folding techniques to theoretically study how dielectric substrates affect the microscopic magnetic exchange interactions in monolayer CrI3. We find that short-range exchange interactions can be drastically tuned by the environmental material, which strongly affects the magnetic transition temperature as well as the magnon excitation spectra. Based on these findings we suggest novel magnetic devices from externally spatially controlled magnetic properties.

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Presenters

  • Malte Roesner

    Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands, Radboud University, Radboud University, Nijmegen

Authors

  • David Soriano

    Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands

  • Alexander N. Rudenko

    Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands, Wuhan University

  • Mikhail I. Katsnelson

    Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands, Radboud University, Nijmegen, Institute for Molecules and Materials, Radboud University, Heijendaalseweg 135, 6525 AJ Nijmegen, The Netherlands

  • Malte Roesner

    Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands, Radboud University, Radboud University, Nijmegen