A STUDY OF INCOMMENSURATE STRUCTURE ON Mo(100) SURFACE BY DOMAIN MODULATION MODEL

By introducing mass density waves, we have determined the positions and intensities of a quartet of spots around the (±1/2, ±1/2) positions on a clean Mo(100) surface at low temperature. lt is shown that the Mo (100)-C(2x2)* incomensurate surface structure is a stable one and can be described in terms of a C(2x2) superlattice modulated by square-like-domains. The domain size and the direction of the domain structure relative to Mo(100) lattice are also discussed.