Theory of optically detected spin noise in nanosystems
M.M. Glazova,c aIoffe Institute, ul. Polytekhnicheskaya 26, St. Petersburg, 194021, Russian Federation bLomonosov Moscow State University, Vorobevy Gory, Moscow, 119991, Russian Federation cSt. Petersburg State University, Universitetskaya naberezhnaya, 7 - 9, St. Petersburg, 199034, Russian Federation
Theory of spin noise in low dimensional systems and bulk semiconductors is reviewed. Spin noise is usually detected by optical means continuously measuring the rotation angle of the polarization direction of the probe beam passing through the sample. Spin noise spectra yield the rich information about the spin properties of the system including, for example, g-factors of the charge carriers, spin relaxation times, parameters of the hyperfine interaction, spin-orbit interaction constants, frequencies and widths of the optical resonances. The review describes basic models of spin noise, methods of its theoretical description, and their relation with the experimental results. We also discuss the relation between the spin noise spectroscopy with the strong and weak quantum measurements as well as with the spin flip Raman scattering, and analyze similar effects including manifestations of the charge and current and valley polarization fluctuations in the optical response. Possible directions for further development of the spin noise spectroscopy are outlined.
Keywords: spin noise, spin correlation functions, nanosystems, quantum dots, nanowires, quantum wells, spin Faraday effect, hyperfine interaction, exchange interaction, spin-orbit interaction PACS:72.70.+m, 78.67.−n (all) DOI:10.3367/UFNe.2020.10.038861 Citation: Smirnov D S, Mantsevich V N, Glazov M M "Theory of optically detected spin noise in nanosystems" Phys. Usp., accepted
Received: 6th, July 2020, accepted: 25th, October 2020