• Publications
  • Influence
Transition from metallic to tunneling regimes in superconducting microconstrictions: Excess current, charge imbalance, and supercurrent conversion
We propose a simple theory for the $I\ensuremath{-}V$ curves of normal-superconducting microconstriction contacts which describes the crossover from metallic to tunnel junction behavior. The detailed
HARP/ACSIS: a submillimetre spectral imaging system on the James Clerk Maxwell Telescope
This paper describes a new Heterodyne Array Receiver Programme (HARP) and AutoCorrelation Spectral Imaging System (ACSIS) that have recently been installed and commissioned on the James Clerk Maxwell
HARP: a submillimetre heterodyne array receiver operating on the James Clerk Maxwell Telescope
This paper describes the key design features and performance of HARP, an innovative heterodyne focal-plane array receiver designed and built to operate in the submillimetre on the James Clerk Maxwell
Ballistic Josephson junctions in edge-contacted graphene.
G graphene-based Josephson junctions with one-dimensional edge contacts of molybdenum rhenium are reported, finding that the critical current oscillates with the carrier density due to phase-coherent interference of the electrons and holes that carry the supercurrent caused by the formation of a Fabry-Pérot cavity.
A spin triplet supercurrent through the half-metallic ferromagnet CrO2
A Josephson supercurrent is reported through the strong ferromagnet CrO2, from which it is inferred that it is a spin triplet supercurrent, and the underlying physical explanation is a conversion from spin singlet pairs to spin triplets at the interface.
Subharmonic energy-gap structure in superconducting constrictions
A Boltzmann-equation approach for the calculation of the I-V characteristics of superconducting constrictions is presented. This technique allows for the inclusion of normal scattering as well as
Proximity Effect From an Andreev Perspective
The current understanding of the superconducting proximity effect is reviewed taking into account recent experimental and theoretical results obtained for mesoscopic normal metal-superconductor
Contribution of dielectrics to frequency and noise of NbTiN superconducting resonators
We study NbTiN resonators by measurements of the temperature dependent resonance frequency and frequency noise. Additionally, resonators are studied covered with SiOx dielectric layers of various
4π-periodic Josephson supercurrent in HgTe-based topological Josephson junctions
The observation of an anomalous response to rf irradiation in a Josephson junction made of a HgTe weak link is reported, understood as due to a 4π-periodic contribution to the supercurrent, and its amplitude is compatible with the expected contribution of a gapless Andreev doublet.
Fluctuations in the electron system of a superconductor exposed to a photon flux
It is shown that the resonator also enables the study of the response of the electron system of the superconductor to pair-breaking photons, microwave photons and varying temperatures, and shows an unprecedented detector sensitivity.