Frequency dependence of the Hall conductivity of a 2D electron gas Galchenkov, L. A. ; Grodnenskiǐ, I. M. ; Kostovetskiǐ, M. V. ; Matov, O. R. Abstract Publication: Soviet Journal of Experimental and Theoretical Physics Letters Pub Date: December 1987 Bibcode: 1987JETPL..46..542G