The phase-dependent linear conductance of a superconducting quantum point contact
arXiv:cond-mat/9505102 · doi:10.1088/0953-8984/8/4/010
Abstract
The exact expression for the phase-dependent linear conductance of a weakly damped superconducting quantum point contact is obtained. The calculation is performed by summing up the complete perturbative series in the coupling between the electrodes. The failure of any finite order perturbative expansion in the limit of small voltage and small quasi-particle damping is analyzed in detail. In the low transmission regime this nonperturbative calculation yields a result which is at variance with standard tunnel theory. Our result predicts the correct sign of the quasi-particle pair interference term and exhibits an unusual phase-dependence at low temperatures in qualitative agreement with the available experimental data.
12 pages (revtex) + 1 postscript figure. Submitted to Phys. Rev. Lett
References in corpus (3)
Cited by in corpus (4)
- Thermal noise in superconducting quantum point-contacts
- Contribution of weak localization to non local transport at normal metal / superconductor double interfaces
- DC transport in a dissipative superconducting quantum point contact
- Phase-dependent damping rate of Josephson plasmons in the nonequilibrium steady state