High-frequency magnetic susceptibility of a 2D electron gas with spin-orbit interaction in a parallel magnetic field under topological phase transition
Yu. A. Kolesnichenko and D. I. Stepanenko
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine
Kharkiv 61103, Ukraine
Received February 04, 2022, published online April 25, 2022
We study theoretically spin transport in two-dimensional electron system with an essential spin-orbit interaction under topological phase transition due to changing a parallel magnetic field. Analytical formulas for the high-frequency magnetic susceptibility tensor under conditions when both spin bands are filled have been obtained. A numerical analysis giving full enough representation of the dependence of the spin magnetic susceptibility on frequency and magnetic field is presented. It has been established that the magnetic susceptibility experiences a jump for magnetic field values at which the connectivity of the Fermi contour is changed.
Key words: magnetic susceptibility, two-dimensional electron system, spin-orbit interaction.