Anisotropic magnon transport in vanadium-doped Ti2C MXenes

Abstract The properties of magnons hosted in the pristine and doped two-dimensional Ti 2 C MXene are theoretically explored as a function of the vanadium doping concentration. By replacing Titanium (Ti) ions with vanadium (V) ones, we obtain the corresponding magnon bands for the different magnetic states formed by systematically varying the vanadium (V) doping concentration. Linear response theory is used to compute the magnon transport coefficients as a function of the doping concentration and temperature. We found that doping has a considerable effect on the symmetries present in the system, allowing for changes in the spin wave stiffness tensor. As a result, a Hall-like transverse magnon transport emerges despite the absence of Berry curvature or topological signatures, whose origin lies in changes in the crystal main axis, thereby introducing anisotropic magnon transport. Our results suggest that doping magnetic Ti 2 C MXenes with vanadium could pave the way towards MXenes-based spin caloritronic systems with tunable anisotropy and directional heat/spin control.