Raman scattering response in the Kitaev magnet beta-Li2IrO3 and its evolution in the magnetic field

Raman scattering has been proven to be a powerful dynamical probe to study magnetic excitations in various frustrated magnets. Here we analyze theoretically the one- and two-magnon Raman scattering intensity in the Kitaev magnet beta-Li2IrO3 and its evolution in the magnetic field. Our analysis shows that the response is very sensitive to the polarization of light and the direction of the external magnetic field, reflecting a peculiar spin dynamics of this compound which arises due to the competition between anisotropic exchange interactions and applied magnetic field.