title: Tunneling spectroscopy and vortex imaging in boron-doped diamond.
abstract: We present the first scanning tunneling spectroscopy study of single-crystalline boron-doped diamond. The measurements were performed below 100 mK with a low temperature scanning tunneling microscope. The tunneling density of states displays a clear superconducting gap. The temperature evolution of the order parameter follows the weak-coupling BCS law with Delta(0)/kBTc approximately 1.74. Vortex imaging at low magnetic field also reveals localized states inside the vortex core that are unexpected for such a dirty superconductor.
authors.affiliation: DRFMC-SPSMS, CEA Grenoble, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France. benjamin.sacepe@cea.fr
authors.forename: B
authors.initials: B
authors.lastname: Sacépé
authors.forename: C
authors.initials: C
authors.lastname: Chapelier
authors.forename: C
authors.initials: C
authors.lastname: Marcenat
authors.forename: J
authors.initials: J
authors.lastname: Kacmarcik
authors.forename: T
authors.initials: T
authors.lastname: Klein
authors.forename: M
authors.initials: M
authors.lastname: Bernard
authors.forename: E
authors.initials: E
authors.lastname: Bustarret