Coherent phonons in NdBa2Cu3O7-x single crystals: Optical-response anisotropy and hysteretic behavior


Coherent phonons in NdBa2Cu3O7-x single crystals: Optical-response anisotropy and hysteretic behavior

Misochko, O. V.; Lebedev, M.; Georgiev, N.; Dekorsy, T.

Femtosecond pump-probe measurements of reflection from crystallographic planes are performed to investigate lattice relaxation dynamics in the NdBa2Cu3O7-x high-temperature superconductor. Ultrafast phonon response is examined over a wide temperature range for various orientations of the pump and probe polarization vectors with respect to particular crystallographic axes. The initial phases of coherent phonons are measured, and hysteretic behavior is revealed in the transition between two temperature regions above T-c for the ac plane.

Keywords: coherent phonons; high temperature superconductors

  • Journal of Experimental and Theoretical Physics 98(2004), 341-347

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Publ.-Id: 6256