To the extent that the B-dependence

To the extent that the B-dependence of δσee can be neglected, Eq. (2.54) gives a parabolic negative magnetoresistance, with a temperature dependence that is that of 34 the negative conductivity correction δσee. This effect can easily be studied up to ωcτ = 10, which would imply an enhancement by a factor of 100 of the resistivity correction in zero magnetic field. (The Hall resistivity ρxy also contains corrections from δσee, but without the enhancement factor.) In 2D it is this enhancement that allows the small effect of electron-electron interactions to be observable experimentally (in as far as the effect is due to diffuson-type contributions).