Subpicosecond time-resolved studies of coherent phonon oscillations in thin-film YBa2Cu3O6+x (x<0.4)

4 March 1991

journal article
Published by AIP Publishing in Applied Physics Letters

Vol. 58 (9) , 980-982
https://doi.org/10.1063/1.104462

Abstract

We report the results of the first time‐resolved observation of impulsively generated coherent optical phonon oscillations in the semiconducting cuprate compound YBa₂Cu₃O_6+x (xA_1g symmetry at 142 cm⁻¹. No oscillations were observed in the superconducting form of Y‐Ba‐Cu‐O either above or below T_c. The amplitude, frequency, and linewidth of this mode were measured over a temperature range from ∼7 K to room temperature.

Keywords

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