title: Tunneling spectroscopy of quasiparticle bound states in a spinful Josephson junction.
abstract: The spectrum of a segment of InAs nanowire, confined between two superconducting leads, was measured as function of gate voltage and superconducting phase difference using a third normal-metal tunnel probe. Subgap resonances for odd electron occupancy-interpreted as bound states involving a confined electron and a quasiparticle from the superconducting leads, reminiscent of Yu-Shiba-Rusinov states-evolve into Kondo-related resonances at higher magnetic fields. An additional zero-bias peak of unknown origin is observed to coexist with the quasiparticle bound states.
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: W
authors.initials: W
authors.lastname: Chang
authors.forename: V E
authors.initials: VE
authors.lastname: Manucharyan
authors.forename: T S
authors.initials: TS
authors.lastname: Jespersen
authors.forename: J
authors.initials: J
authors.lastname: Nygård
authors.forename: C M
authors.initials: CM
authors.lastname: Marcus