title: Interplay between quantum confinement and surface effects in thickness selective stability of thin Ag and Eu films.
abstract: Using first-principles calculations, we show that both face-centered cubic (fcc) Ag (1 1 0) ultrathin films and body-centered cubic (bcc) Eu(1 1 0) ultrathin films exhibit thickness selective stability. However, the origin of such thickness selection is different. While the thickness selective stability in fcc Ag(1 1 0) films is mainly due to the well-known quantum well states ascribed to the quantum confinement effects in free-electron-like metal films, the thickness selection in bcc Eu(1 1 0) films is more complex and also strongly correlated with the occupation of the surface and surface resonance states.
authors.affiliation: Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130117, People's Republic of China.
authors.forename: Xiaojie
authors.initials: X
authors.lastname: Liu
authors.forename: Cai-Zhuang
authors.initials: CZ
authors.lastname: Wang