title: Comment on "Rashba Spin-Orbit Coupling in Image Potential States".
authors.affiliation: International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Ibaraki 304-0044, Japan.
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Arafune
authors.affiliation: Department of Advanced Materials Science, Graduate School of Frontier Science, The University of Tokyo, Kashiwa 5-1-5, Chiba 277-8561, Japan.
authors.forename: Takeo
authors.initials: T
authors.lastname: Nakazawa
authors.affiliation: Department of Advanced Materials Science, Graduate School of Frontier Science, The University of Tokyo, Kashiwa 5-1-5, Chiba 277-8561, Japan.
authors.forename: Noriaki
authors.initials: N
authors.lastname: Takagi
authors.affiliation: Department of Advanced Materials Science, Graduate School of Frontier Science, The University of Tokyo, Kashiwa 5-1-5, Chiba 277-8561, Japan.
authors.forename: Maki
authors.initials: M
authors.lastname: Kawai
authors.affiliation: College of Humanities and Sciences, Nihon University, Tokyo 156-8550, Japan.|Center for Materials Research by Information Integration, National Institute for Materials Science, Ibaraki 305-0047, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ishida