Physics – Condensed Matter – Superconductivity
Scientific paper
2000-07-21
Physics
Condensed Matter
Superconductivity
10 pages, 10 figs; subm PRB
Scientific paper
10.1103/PhysRevB.63.174505
The sheet impedances, Z(w,T), of several superconducting a-Mo77Ge23 films and one In/InOx film have been measured in zero field using a two-coil mutual inductance technique at frequencies from 100 Hz to 100 kHz. Z(w,T) is found to have three contributions: the inductive superfluid, renormalized by nonvortex phase fluctuations; conventional vortex-antivortex pairs, whose contribution turns on very rapidly just below the usual Kosterlitz-Thouless-Berezinskii unbinding temperature; and an anomalous contribution. The latter is predominantly resistive, persists well below the KTB temperature, and is weakly dependent on frequency down to remarkably low frequencies, at least 100 Hz. It increases with T as e-U'(T)/kT, where the activation energy, U'(T), is about half the energy to create a vortex-antivortex pair, indicating that the frequency dependence is that of individual excitations, rather than critical behavior.
Graybeal John M.
Lemberger Thomas R.
Turneaure Stefan J.
No associations
LandOfFree
Dynamic Impedance of Two-Dimensional Superconducting Films Near the Superconducting Transition 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 Dynamic Impedance of Two-Dimensional Superconducting Films Near the Superconducting Transition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic Impedance of Two-Dimensional Superconducting Films Near the Superconducting Transition will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-349503