Acoustic Phonon Dynamics in Co-Doped BaFe₂As₂ Thin Film

2026/07/20 by Alexander Bartenev, Roman Kolodka, Larry Theran +5
#cond-mat.supr-con

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Abstract

Pump-probe reflectivity reveals coherent acoustic oscillations at 33 and 8.2 GHz in a Ba(Fe_0.92Co_0.08)₂As₂ thin film. The acoustic response was analyzed using a modified logistic-function model, suggesting a temporal redistribution of coherent acoustic energy consistent with anharmonic decay of the higher-frequency mode into the lower-frequency mode.

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