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Admittance of a long diffusive SNS junction | | K. S. Tikhonov
; M. V. Feigel'man
; | | Date: |
9 Dec 2014 | | Abstract: | The dynamical properties of hybrid normal metal/superconductor structures
have recently come into research focus both experimentally and theoretically.
Recent experimental studies of the coherent admittance $% Y(omega )$ of SNS
rings as function of the phase difference $phi _{0}$ are still not fully
understood. Here we concentrate on the linear response regime, calculating
$Y(omega )$ by solving Usadel equations, linearised in electric field.
Although partially reproducing previously known results, we find qualitatively
different behaviour in the collisionless regime of $ au _{in}^{-1}ll omega
lesssim E_{Th}$ and high temperature $Tgg E_{Th}$ and low temperature
$Tlesssim E_{Th}$ near the minigap closing $phi _{0}sim pi $. We find that
the dissipative part $mbox{Re}Y(omega )$ peaks when the minigap closes (at a
phase difference of $pi $) even at high temperatures, when the equilibrium
supercurrent is fully suppressed. | | Source: | arXiv, 1412.2879 | | Services: | Forum | Review | PDF | Favorites | |
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