One-dimensional metallic surface states of Pt-induced atomic nanowires on Ge(0 0 1). (26th May 2016)

• Record Type: Journal Article
• Authors: Yaji, Koichiro; Kim, Sunghun; Mochizuki, Izumi; Takeichi, Yasuo; Ohtsubo, Yoshiyuki; Le Fèvre, Patrick; Bertran, François; Taleb-Ibrahimi, Amina; Shin, Shik; Komori, Fumio
• Is Part Of: Journal of physics. Volume 28:Number 28(2016)
• Publication Date: 2016-05-26
• Subjects: one-dimensional metallic band -- Rashba effect -- structural phase transition; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/28/28/284001
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Surface states of platinum-induced atomic nanowires on a germanium (0 0 1) surface, which shows a structural phase transition at 80 K, were studied by angle-resolved photoelectron spectroscopy (ARPES). We observed four one-dimensional metallic surface states, among which, two bands were reported in our previous study (Yaji et al 2013 Phys. Rev . B87 241413). One of the newly-found two bands is a quasi-one-dimensional state and is split into two due to the Rashba effect. Photoelectron intensity from one of the spin-polarized branches is reduced at a boundary of the surface Brillouin zone below the phase transition temperature. The reduction of the photoelectron intensity in the low temperature phase is interpreted as the interference of photoelectrons, not as the Peierls instability. We also discuss the low energy properties of the metallic surface states and their spin splitting using high-resolution ARPES with a vacuum ultraviolet laser.