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

H. -T. S. Lihn·E. -J. Choi·S. Kaplan·H. D. Drew·Q. Li·D. B. Fenner
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Abstract

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$% _{7-δ}$ 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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H. -T. S. Lihn, E. -J. Choi, S. Kaplan, H. D. Drew, Q. Li, D. B. Fenner. 1995-08-24. Grain Boundary Induced Magneto-Far Infrared Resonances in Superconducting YBa$_2$Cu$_3$O$_{7-δ}$ Thin Films. https://doi.org/10.1103/physrevb.53.927

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