title: Proximity-induced superconductivity in DNA.
abstract: Conductivity measurements on double-stranded DNA molecules deposited by a combing process across a submicron slit between rhenium/carbon metallic contacts reveal conduction to be ohmic between room temperature and 1 kelvin. The resistance per molecule is less than 100 kilohm and varies weakly with temperature. Below the superconducting transition temperature (1 kelvin) of the contacts, proximity-induced superconductivity is observed. These results imply that DNA molecules can be conducting down to millikelvin temperature and that phase coherence is maintained over several hundred nanometers.
authors.affiliation: Laboratoire de Physique des Solides, Associé au CNRS, Bât 510, Université Paris-Sud, 91405, Orsay, France.
authors.forename: A Y
authors.initials: AY
authors.lastname: Kasumov
authors.forename: M
authors.initials: M
authors.lastname: Kociak
authors.forename: S
authors.initials: S
authors.lastname: Guéron
authors.forename: B
authors.initials: B
authors.lastname: Reulet
authors.forename: V T
authors.initials: VT
authors.lastname: Volkov
authors.forename: D V
authors.initials: DV
authors.lastname: Klinov
authors.forename: H
authors.initials: H
authors.lastname: Bouchiat
mesh_terms: D004247:DNA / Q000737:chemistry*; D004553:Electric Conductivity; D017097:Electric Impedance; D004563:Electrochemistry; D004566:Electrodes; D018625:Microscopy, Atomic Force; D013696:Temperature
chemical_list: D004247:DNA