Theory of indirect (or super) exchange interaction between a pair of adatoms on the solid surface has been described. It is analogous to the super exchange interaction in Perovskite antiferromagnets. The effective exchange integral
J± has been derived from first principles. The results of numerical calculation of
J± for H/W system show that (1)
J± is negative and amounts to a considerable magnitude, (2) it is of long range (damps slowly and oscillates strongly as a function of the adatom-adatom distance), and (3) Fermi energy and adsorption form (or site) also affect it strongly. Finally antiferromagnetic spin ordering of the adsorbed layer on the surface has been briefly discussed.
抄録全体を表示