Physics – Condensed Matter – Superconductivity
Scientific paper
2007-05-15
Phys. Rev. B 76, 054525 (2007)
Physics
Condensed Matter
Superconductivity
10 pages, 7 figures, to be published in Phys.Rev.B, supplementary animations of oscillating local electric field can be found
Scientific paper
10.1103/PhysRevB.76.054525
We studied response of the Josephson vortex lattice in layered superconductors to the high-frequency c-axis electric field. We found a simple relation connecting the dynamic dielectric constant with the perturbation of the superconducting phase, induced by oscillating electric field. Numerically solving equations for the oscillating phases, we computed the frequency dependences of the loss function at different magnetic fields, including regions of both dilute and dense Josephson vortex lattices. The overall behavior is mainly determined by the c-axis and in-plane dissipation parameters, which is inversely proportional to the anisotropy. The cases of weak and strong dissipation are realized in $\mathrm{Bi_{2}Sr_{2}CaCu_{2}O_{x}}$ and underdoped $\mathrm{YBa_{2}Cu_{3} O_{x}}$ correspondingly. The main feature of the response is the Josephson-plasma-resonance peak. In the weak-dissipation case additional satellites appear in the dilute regime mostly in the higher-frequency region due to excitation of the plasma modes with the wave vectors set by the lattice structure. In the dense-lattice limit the plasma peak moves to higher frequency and its intensity rapidly decreases, in agreement with experiment and analytical theory. Behavior of the loss function at low frequencies is well described by the phenomenological theory of vortex oscillations. In the case of very strong in-plane dissipation an additional peak in the loss function appears below the plasma frequency. Such peak has been observed experimentally in underdoped $\mathrm{YBa_{2}Cu_{3} O_{x}}$. It is caused by frequency dependence of in-plane contribution to losses rather then a definite mode of phase oscillations.
No associations
LandOfFree
Electrodynamics of Josephson vortex lattice in high-temperature superconductors 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 Electrodynamics of Josephson vortex lattice in high-temperature superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrodynamics of Josephson vortex lattice in high-temperature superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-669548