Triple-Q and Single-Q States in Antiferromagnetic fcc Transition Metals with the First-Kind Ordering

Abstract

By using a real space expansion approach to calculate the Green function of d-electrons, the four-spin interaction is derived and the relative stability among various multiple spin density wave states is discussed for antiferromagnetic fcc transition metals with the first-kind ordering. The transition from a triple-Q state to a single-Q state is shown to occur with increasing or decreasing the number of d-electrons from the nearly half-filled band region.