Zeeman Spin Splitting Frequency Renormalization in Disordered InteractingElectronic Systems

摘要

At low temperatures, the magnetic field affects the thermodynamic and transportproperties of interacting disordered electronic systems via the Zeeman spin splitting frequency. It is shown that this frequency always appears multiplied by the spin Fermi liquid factor and renormalizes as the spin susceptibility, resulting in an enhanced magnetic field. This result is derived from perturbation theory and renormalization group analysis and implements the Ward identities derived for the spin vertices in the presence of the magnetic field. The implications of this result in the weak and strong localization regime are discussed.