Spitzer resistivity

The Spitzer resistivity (or plasma resistivity), also called 'Spitzer-Harm resistivity', is an expression describing the electrical resistance in a plasma, which was first formulated by Lyman Spitzer in 1950. The Spitzer resistivity of a plasma decreases in proportion to the electron temperature as ${\displaystyle T_{\text{e}}^{-3/2}}$.

The inverse of the Spitzer resistivity ${\displaystyle \eta _{\rm {Sp}}}$ is known as the Spitzer conductivity ${\displaystyle \sigma _{\rm {Sp}}=1/\eta _{\rm {Sp}}}$.