Supercurrent and noise in point contact between two different superconductors

Abstract

We show that, for a quantum point contact between two superconductors of different gap magnitudes, Andreev bound states do not exist for certain phase differences and gap ratios. Continuum states may dominate the transport, and the supercurrent noise is qualitatively different from the case of equal gaps.

to appear in PRB

References in corpus (6)

• AC JOSEPHSON EFFECT IN A SINGLE QUANTUM CHANNEL
• Supercurrent noise in quantum point contacts
• Shot noise and coherent multiple charge transfer in superconducting quantum point-contacts
• Thermal noise in superconducting quantum point-contacts
• Adiabatic Dynamics of Superconducting Quantum Point Contacts
• Non-equilibrium current noise in mesoscopic disordered SNS junctions

Cited by in corpus (6)

• Spin current and spin accumulation near a Josephson junction between a singlet and triplet superconductor
• Spin current in topologically trivial and nontrivial noncentrosymmetric superconductors
• Fluctuations of the Josephson current and electron-electron interactions in superconducting weak links
• Signatures of odd-frequency pairing in the Josephson junction current noise
• ac Josephson effect in asymmetric superconducting quantum point contacts
• Tunneling Hamiltonian analysis of DC Josephson currents in a weakly-interacting Bose-Einstein condensate