Physics – Condensed Matter – Superconductivity
Scientific paper
2007-09-26
Phys. Rev. B 76, 174502 (2007)
Physics
Condensed Matter
Superconductivity
12 pages, 4 figures; accepted for publication in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.76.174502
We consider a $SBS$ Josephson junction the superconducting electrodes $S$ of which are in contact with normal metal reservoirs ($B$ means a barrier). For temperatures near $T_{c}$ we calculate an effective critical current $% I_{c}^{\ast}$ and the resistance of the system at the currents $I<$ $% I_{c}^{\ast}$ and $I>>I_{c}^{\ast}$. It is found that the charge imbalance, which arises due to injection of quasiparticles from the $N$ reservoirs into the $S$ wire, affects essentially the characteristics of the structure. The effective critical current $I_{c}^{\ast}$ is always larger than the critical current $I_{c}$ in the absence of the normal reservoirs and increases with decreasing the ratio of the length of the $S$ wire $2L$ to the charge imbalance relaxation length $l_{Q}$. It is shown that a series of peaks arises on the $I-V$ characteristics due to excitation of the Carlson-Goldman collective modes. We find the position of Shapiro steps which deviates from that given by the Josephson relation.
No associations
LandOfFree
Charge imbalance and Josephson effects in superconductor-normal metal mesoscopic structures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Charge imbalance and Josephson effects in superconductor-normal metal mesoscopic structures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge imbalance and Josephson effects in superconductor-normal metal mesoscopic structures will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-694964