title: Two-Dimensional Superconductor with a Giant Rashba Effect: One-Atom-Layer Tl-Pb Compound on Si(111).
abstract: A one-atom-layer compound made of one monolayer of Tl and one-third monolayer of Pb on a Si(111) surface having √3×√3 periodicity was found to exhibit a giant Rashba-type spin splitting of metallic surface-state bands together with two-dimensional superconducting transport properties. Temperature-dependent angle-resolved photoelectron spectroscopy revealed an enhanced electron-phonon coupling for one of the spin-split bands. In situ micro-four-point-probe conductivity measurements with and without magnetic field demonstrated that the (Tl, Pb)/Si(111) system transformed into the superconducting state at 2.25 K, followed by the Berezinskii-Kosterlitz-Thouless mechanism. The 2D Tl-Pb compound on Si(111) is believed to be the prototypical object for prospective studies of intriguing properties of the superconducting 2D system with lifted spin degeneracy, bearing in mind that its composition, atomic and electron band structures, and spin texture are already well established.
authors.affiliation: Institute of Automation and Control Processes FEB RAS, 690041 Vladivostok, Russia.|School of Natural Sciences, Far Eastern Federal University, 690000 Vladivostok, Russia.
authors.forename: A V
authors.initials: AV
authors.lastname: Matetskiy
authors.affiliation: Department of Physics, University of Tokyo, Tokyo 113-0033, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Ichinokura
authors.affiliation: Institute of Automation and Control Processes FEB RAS, 690041 Vladivostok, Russia.|School of Natural Sciences, Far Eastern Federal University, 690000 Vladivostok, Russia.
authors.forename: L V
authors.initials: LV
authors.lastname: Bondarenko
authors.affiliation: Institute of Automation and Control Processes FEB RAS, 690041 Vladivostok, Russia.|School of Natural Sciences, Far Eastern Federal University, 690000 Vladivostok, Russia.
authors.forename: A Y
authors.initials: AY
authors.lastname: Tupchaya
authors.affiliation: Institute of Automation and Control Processes FEB RAS, 690041 Vladivostok, Russia.|School of Natural Sciences, Far Eastern Federal University, 690000 Vladivostok, Russia.
authors.forename: D V
authors.initials: DV
authors.lastname: Gruznev
authors.affiliation: Institute of Automation and Control Processes FEB RAS, 690041 Vladivostok, Russia.|School of Natural Sciences, Far Eastern Federal University, 690000 Vladivostok, Russia.|Department of Electronics, Vladivostok State University of Economics and Service, 690600 Vladivostok, Russia.
authors.forename: A V
authors.initials: AV
authors.lastname: Zotov
authors.affiliation: Institute of Automation and Control Processes FEB RAS, 690041 Vladivostok, Russia.|School of Natural Sciences, Far Eastern Federal University, 690000 Vladivostok, Russia.
authors.forename: A A
authors.initials: AA
authors.lastname: Saranin
authors.affiliation: Department of Physics, University of Tokyo, Tokyo 113-0033, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Hobara
authors.affiliation: Department of Physics, University of Tokyo, Tokyo 113-0033, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Takayama
authors.affiliation: Department of Physics, University of Tokyo, Tokyo 113-0033, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Hasegawa