Research Cihan Bacaksiz

Abstract

The realization of the first two-dimensional (2D) magnetic material in 2017 revolutionized the field and led to discovery of numerous other magnetic monolayers to date. Since these materials are all surface, they bear promise for facilitated planar transport of atomistic magnetic spin oscillations, called spin-waves or magnons. Coupled to the fact that properties of 2D materials are prone to extensive tuning by mechanical strain, electronic gating, or heterostructuring, magnetic monolayers offer a novel platform for magnonics by design that may outperform the electronics and spintronics of the modern day. On that path, the theoretical understanding and predictive modeling seem to lag behind the extremely fast experimental progress in the field. To change this unfavorable picture, this project will set up a multiscale methodology to provide a magnonic roadmap in mono- and bilayer spin-lattice systems of 2D magnetic materials. For that purpose, the modulations of microscopic magnetic exchange interaction in prominent mono- and bilayers will be detailed in presence of external stimuli and internal degrees of freedom, before reporting the resulting magnetic spin textures, and characterizing the propagation, velocity and frequency of magnonic excitations, with an outlook towards precisely controlled, long-range propagation of high-frequency magnons required for future technology.

Researcher(s)

• Promoter: Milosevic Milorad
• Fellow: Bacaksiz Cihan

Research team(s)

• Condensed Matter Theory

Project type(s)

• Research Project

Abstract

This project aims to investigate the properties of recently emerged two-dimensional (2D) materials having intrinsic magnetism. Motivated by the recent discovery of the ferromagnetic 2D monolayer CrI3 and the found plethora of magnetic phase transitions with every added layer, we investigate the formation mechanism, the temperature dependence and the routes for tuning 2D magnetism by external stimuli such as strain, charge doping, and electric field, with an outlook to possible applications.

Researcher(s)

• Promoter: Bacaksiz Cihan

Research team(s)

• Condensed Matter Theory

Project type(s)

• Research Project

Abstract

The scope of the proposed project is to investigate the magnetic properties of recently emerged two-dimensional (2D) materials having intrinsic magnetism. Nanoscale magnetism is of great scientific interest and has high technological relevance. Since the discovery of graphene, twodimensional materials have drawn considerable attention due to their extraordinary physical properties and potential application in nanoscale magneto-electronics, so-called spintronics. Although most of the 2D materials do not exhibit magnetism, the search for intrinsic ferromagnetism in the monolayer limit did not end. Motivated by the recent discovery of the ferromagnetic monolayer CrI3 and its number of layers dependent magnetic phase transitions we propose to use density functional theory to predict other 2D ferromagnetic materials. Furthermore, we want to understand the formation mechanisms and stability of magnetism in 2D materials and possible routes of tuning it by external stimuli such as strain, charge doping, and electric field.

Researcher(s)

• Promoter: Peeters Francois
• Fellow: Bacaksiz Cihan

Research team(s)

• Condensed Matter Theory

Project type(s)

• Research Project