title: Quantum Dots Embedded in Graphene Nanoribbons by Chemical Substitution.
abstract: Bottom-up chemical reactions of selected molecular precursors on a gold surface can produce high quality graphene nanoribbons (GNRs). Here, we report on the formation of quantum dots embedded in an armchair GNR by substitutional inclusion of pairs of boron atoms into the GNR backbone. The boron inclusion is achieved through the addition of a small amount of boron substituted precursors during the formation of pristine GNRs. In the pristine region between two boron pairs, the nanoribbons show a discretization of their valence band into confined modes compatible with a Fabry-Perot resonator. Transport simulations of the scattering properties of the boron pairs reveal that they selectively confine the first valence band of the pristine ribbon while allowing an efficient electron transmission of the second one. Such band-dependent electron scattering stems from the symmetry matching between the electronic wave functions of the states from the pristine nanoribbons and those localized at the boron pairs.
authors.affiliation: CIC nanoGUNE , Tolosa Hiribidea 76, 20018 Donostia-San Sebastian, Spain.
authors.forename: Eduard
authors.initials: E
authors.lastname: Carbonell-Sanromà
authors.affiliation: Centro de Fı́sica de Materiales CSIC-UPV/EHU , 20018 Donostia-San Sebastian, Spain.|Donostia International Physics Center, 20018 Donostia-San Sebastian, Spain.
authors.forename: Pedro
authors.initials: P
authors.lastname: Brandimarte
authors.affiliation: CIC nanoGUNE , Tolosa Hiribidea 76, 20018 Donostia-San Sebastian, Spain.|Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain.|Department of Physics and Astronomy, Aarhus University , Ny Munkegade 120, Bld. 1520, 8000 Aarhus C, Denmark.
authors.forename: Richard
authors.initials: R
authors.lastname: Balog
authors.affiliation: CIC nanoGUNE , Tolosa Hiribidea 76, 20018 Donostia-San Sebastian, Spain.|Centro de Fı́sica de Materiales CSIC-UPV/EHU , 20018 Donostia-San Sebastian, Spain.|Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain.
authors.forename: Martina
authors.initials: M
authors.lastname: Corso
authors.affiliation: International Center for Materials Nanoarchitectonics, National Institute for Materials Science , 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan.|Department of Physics, University of Basel , CH-4056 Basel, Switzerland.|PRESTO, Japan Science and Technology Agency , Kawaguchi, Saitama 332-0012, Japan.
authors.forename: Shigeki
authors.initials: S
authors.lastname: Kawai
authors.affiliation: Donostia International Physics Center, 20018 Donostia-San Sebastian, Spain.|Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain.
authors.forename: Aran
authors.initials: A
authors.lastname: Garcia-Lekue
authors.affiliation: PRESTO, Japan Science and Technology Agency , Kawaguchi, Saitama 332-0012, Japan.|Department of Chemistry, Graduate School of Science, Kyoto University , Kitashirakawa Oiwake, Sakyo, Kyoto 606-8502, Japan.
authors.forename: Shohei
authors.initials: S
authors.lastname: Saito
authors.affiliation: Institute of Transformative Bio-molecules, Nagoya University , Furo, Chikusa, Nagoya 464-8602, Japan.
authors.forename: Shigehiro
authors.initials: S
authors.lastname: Yamaguchi
authors.affiliation: Department of Physics, University of Basel , CH-4056 Basel, Switzerland.
authors.forename: Ernst
authors.initials: E
authors.lastname: Meyer
authors.affiliation: Centro de Fı́sica de Materiales CSIC-UPV/EHU , 20018 Donostia-San Sebastian, Spain.|Donostia International Physics Center, 20018 Donostia-San Sebastian, Spain.
authors.forename: Daniel
authors.initials: D
authors.lastname: Sánchez-Portal
authors.affiliation: CIC nanoGUNE , Tolosa Hiribidea 76, 20018 Donostia-San Sebastian, Spain.|Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain.
authors.forename: Jose Ignacio
authors.initials: JI
authors.lastname: Pascual
keywords: Scanning tunneling microscopy; electronic transport; graphene nanoribbon; on-surface synthesis; quantum dot; scanning tunneling spectroscopy