“Magic” Orientation Angles to Suppress Spin-Driven Hall Currents in Anisotropic 2D Materials with an Ideal Skyrmion Gas

• Published in: Journal of physical chemistry. C Vol. 125; no. 20; pp. 11035 - 11042
• Main Authors: Zadorozhnyi, Andrei, Dahnovsky, Yuri
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 27.05.2021
• Subjects: C: Spectroscopy and Dynamics of Nano, Hybrid, and Low-Dimensional Materials; Electric fields; Heat transfer; INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Quantum mechanics; Scattering; Thermodynamic modeling
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/acs.jpcc.1c00809

The Hall effect depending on conduction electron spin projection becomes very different for anisotropic 2D crystals. In this case, the spin-dependent electron current is strongly determined by the orientation angle, θ, of the sample with respect to an applied electric field. The spin-up and -down components of the direct and Hall charge currents oscillate with the angle 2θ. The direct and Hall components of the current have the structure where there are the angle-independent part, oscillation amplitude, and phase shift. All three quantitates strongly depend on the electron spin projection, electron mass ratio, and skyrmion size. We find that there are “magic” orientation angles where the spin-up, spin-down, and total Hall currents vanish. There is a great interest in computations based on 2D materials with skyrmions. Such properties can be useful for computer logic operations based on skyrmions.