Electrically tunable magnon bands in two-dimensional magnets

Magnons, namely quanta of spin waves-coherent excitations of magnetically ordered medium-are considered as promising carriers of spin information for classical [Nat. Phys. 11, 453 (2015)] and quantum [npj Quantum Info. 3, 28 (2017)] information processing. For these applications, the ability to electrically reconfigure the bandstructure of magnons, can open novel opportunities to create dynamic magnon crystals and multifunctional high frequency, logic and quantum devices [Journal of Phys. D: Appl. Phys.50, 24 (2017)]. In this work, we propose a novel platform to realize electrically tunable magnon bands, namely recently discovered two-dimensional (2-D) magnets [Nature 546, 270(2017)]. For this purpose, we utilize the efficient electrical control of spin-spin interactions within bilayer Chromium Iodide [Nature Mat. 17, 406 (2018)] to numerically demonstrate electrically controlled sub-Terahertz magnons. This study opens the possibility of using van der Waal magnets and their heterostructures for high frequency magnon spintronics applications.