Charge and spin gaps in the dimerized Hubbard model

Abstract

By using the bosonization and renormalization group methods, we have studied the low energy physical properties in the one-dimensional dimerized Hubbard model. The formation of charge and spin gaps is investigated both for the half-filled electron band and away from the half-filled band. The scaling laws of the charge and spin gaps with the dimerization parameter Δ and the repulsive interaction strength U are obtained.