Effects of Coulomb Interactions on the Landau Diamagnetism

The diamagnetic susceptibility of an electron gas is reduced by Coulomb interactions below the Landau value in proportion to $\epsilon \beta {{\kappa }_0}^2$, where $\epsilon$ is the plasma parameter, ${\kappa }_0$ is the Debye screening constant, and $\beta =\frac{1}{\mathrm{kT}}$.