Relating Andreev Bound States and Supercurrents in Hybrid Josephson Junctions
- F. Nichele ,
- E. Portolés ,
- A. Fornieri ,
- A. M. Whiticar ,
- A. C. C. Drachmann ,
- Sergei Gronin ,
- T. Wang ,
- Geoff Gardner ,
- C. Thomas ,
- A. T. Hatke ,
- Professor Michael J Manfra ,
- Charles Marcus
Physical Review Letters | , Vol 124(22): pp. 226801
We demonstrate concomitant measurement of phase-dependent critical current and Andreev bound state spectrum in a highly transmissive InAs Josephson junction embedded in a dc superconducting quantum interference device (SQUID). Tunneling spectroscopy reveals Andreev bound states with near unity transmission probability. A nonsinusoidal current-phase relation is derived from the Andreev spectrum, showing excellent agreement with the one extracted from the SQUID critical current. Both measurements are reconciled within a short junction model where multiple Andreev bound states, with various transmission probabilities, contribute to the entire supercurrent flowing in the junction.