Observation of a coherent optical phonon in the iron pnictide superconductor Ba ( Fe 1 − x Co x ) 2 As 2 ( x = 0.06 and 0.08) - ENSTA Paris - École nationale supérieure de techniques avancées Paris Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2009

Observation of a coherent optical phonon in the iron pnictide superconductor Ba ( Fe 1 − x Co x ) 2 As 2 ( x = 0.06 and 0.08)

Résumé

We report the observation of a coherent lattice oscillation in a pnictide superconductor. A coherent fully symmetric optical phonon was detected in Ba(Fe1−xCox)2As2 (x=0.06 and x=0.08) using time-resolved pump-probe reflectivity with 40 fs time resolution. The analysis of the phonon parameters for various excitation fluences reveals no evident difference below and above the critical temperature, suggesting that the A1g mode is not involved in the superconducting phase transition.
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hal-01405494 , version 1 (30-11-2016)

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B. Mansart, D. Boschetto, A. Savoia, F. Rullier-Albenque, A. Forget, et al.. Observation of a coherent optical phonon in the iron pnictide superconductor Ba ( Fe 1 − x Co x ) 2 As 2 ( x = 0.06 and 0.08). Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2009, 80 (17), ⟨10.1103/PhysRevB.80.172504⟩. ⟨hal-01405494⟩
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