title: Nonlinear dynamics of incommensurate surface layers.
abstract: We describe analytically the nonlinear dynamics of the incommensurate surface layer ("self-modulated" system) with a spatially periodical structure. In the framework of the Frenkel-Kontorova model the nonlinear excitations of the periodic soliton lattice, such as moving additional kinks and gap solitons, are investigated.
authors.affiliation: B.Verkin Institute for Low Temperature Physics and Engineering, 47 Lenin Avenue, 61103 Kharkov, Ukraine.
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Kovalev
authors.forename: Igor V
authors.initials: IV
authors.lastname: Gerasimchuk
authors.forename: Gerard A
authors.initials: GA
authors.lastname: Maugin