Elena V Orlenko
Peter the Great St. Petersburg Polytechnic University, Russia
Title: Influence of spin-orbit interaction on magnetic properties of fullerenes
Biography
Biography: Elena V Orlenko
Abstract
The current paper is devoted to the consideration of sp2-carbonaceous fullerenes molecules in homogeneous magnetic field. Due to reduction system symmetry in magnetic field to the axial type, the energy splitting gives rise to forming dominant atomic structures in fullerenes molecule with local symmetries. Spin-orbit interaction plays a crucial role in this phenomenon. The current paper is aimed at determination of such spin-orbit coupling parameters as energy Eso and constant aso as well as g-factors Lande’ for magnetization study of the C60-based compounds in magnetic field. Magnetization study of the C60-based compounds in magnetic field for a wide temperature range demonstrate an amazing feature of its behavior, such as a reduced Lande’ g-factor values g<1. It is shown in experiments a variability of fullerene C60 g-factor in the course of magneto-optical study at pulsed magnetic field up to 32 T in the frequency range ν=60−90 GHz at T=1:8K. There are three values of g-factors: namely: g1 = 0.43±0.03; g2 = 0.27±0.02 and g3=0.19±0.01. Such experiments give rice to assume 1) the availability of existence of three different independent configurations of local spins in the molecule; 2) the influence of the spin-orbit coupling onto forming the Eigen state with determined total angular momentum. There are three dominant symmetric atomic groups of C60-Yh corresponding to the polar point groups (C3v, C3, C2v, C2, Cs, C1), which respond to a magnetic field: 1) a hexagon-faces 2) edges (double bonds, lying on the circle about the direction of magnetic field); 3) vertices (of pentagons, transited about magnetic field direction).