title: Quantum confinement between self-organized Pt nanowires on Ge(001).
abstract: The existence of one-dimensional (1D) electronic states between self-organized Pt nanowires spaced 1.6 or 2.4 nm apart on a Ge(001) surface is revealed by low-temperature scanning tunneling microscopy. These perfectly straight Pt nanowires act as barriers for a surface state (located just below the Fermi level) of the underlying terrace. The energy positions of the 1D electronic states are in good agreement with the energy levels of a quantum particle in a well. Spatial maps of the differential conductivity of the 1D electronic states conclusively reveal that these states are exclusively present in the troughs between the Pt nanowires.
authors.affiliation: Solid State Physics, MESA+ Research Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Nuri
authors.initials: N
authors.lastname: Oncel
authors.forename: Arie
authors.initials: A
authors.lastname: van Houselt
authors.forename: Jeroen
authors.initials: J
authors.lastname: Huijben
authors.forename: Ann-Sofie
authors.initials: AS
authors.lastname: Hallbäck
authors.forename: Oguzhan
authors.initials: O
authors.lastname: Gurlu
authors.forename: Harold J W
authors.initials: HJ
authors.lastname: Zandvliet
authors.forename: Bene
authors.initials: B
authors.lastname: Poelsema