Grain Boundary Induced Magneto-Far Infrared Resonances in Superconducting YBa$_2$Cu$_3$O$_{7-δ}$ Thin Films

Details Grain Boundary Induced Magneto-Far Infrared Resonances in Superconducting YBa$_2$Cu$_3$O$_{7-δ}$ Thin Films Grain Boundary Induced Magneto-Far Infrared Resonances in Superconducting YBa$_2$Cu$_3$O$_{7-δ}$ Thin Films

1995-08-24

arxiv.org/abs/cond-mat/9508108v1

Physics

Condensed Matter

Latex file (14 pages) + 4 Postscript figures, uuencoded

Scientific paper

10.1103/PhysRevB.53.927

Spectral features induced by 45$^{\circ }$ in-plane misoriented grains have been observed in the far infrared magneto-transmission of YBa$_2$Cu$_3$O$% _{7-\delta }$ thin films. Two strong dispersive features are found at 80 and 160 $cm^{-1}$ and a weaker one at 116 $cm^{-1}$. The data can be well represented by Lorentzian oscillator contributions to the conductivity. Several possible interpretations are discussed. We conclude that the resonances are due to vortex core excitations.

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