title: Connectivity dependence of Fano resonances in single molecules.
abstract: Using a first principles approach combined with analysis of heuristic tight-binding models, we examine the connectivity dependence of two forms of quantum interference in single molecules. Based on general arguments, Fano resonances are shown to be insensitive to connectivity, while Mach-Zehnder-type interference features are shown to be connectivity dependent. This behaviour is found to occur in molecular wires containing anthraquinone units, in which the pendant carbonyl groups create Fano resonances, which coexist with multiple-path quantum interference features.
authors.affiliation: Department of Physics, Lancaster University, Lancaster, UK. c.lambert@lancaster.ac.uk and Department of Physics, College of Education for Pure Science, Tikrit University, Tikrit, Iraq.
authors.forename: Ali K
authors.initials: AK
authors.lastname: Ismael
authors.affiliation: Department of Physics, Lancaster University, Lancaster, UK. c.lambert@lancaster.ac.uk.
authors.forename: Iain
authors.initials: I
authors.lastname: Grace
authors.affiliation: Department of Physics, Lancaster University, Lancaster, UK. c.lambert@lancaster.ac.uk.
authors.forename: Colin J
authors.identifier: http://orcid.org/0000-0003-2332-9610
authors.initials: CJ
authors.lastname: Lambert