Weak localization effects in conductance measurements of La2−xSrxCuO4−y

Abstract Conductivity data from many La 2−x Sr x CuO 4−y crystals is presented. All sufficiently conductive crystals (with conductances of order e 2 /h per square per CuO 2 layer) show a logarithmic temperature dependent correction to the conductance, of order e 2 /h, predicted by weak localization theory.