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Separating pairing from quantum phase coherence dynamics above the superconducting transition by femtosecond spectroscopy
Ivan Madan, Toru Kurosawa, Yasunori Toda +4
In classical superconductors an energy gap and phase coherence appear simultaneously with pairing at the transition to the superconducting state. In high-temperature superconductor…
Real time measurement of the emergence of superconducting order in a high temperature superconductor
I. Madan, P. Kusar, V. V. Baranov +4
Systems which rapidly evolve through symmetry-breaking transitions on timescales comparable to the fluctuation timescale of the single-particle excitations may behave very differen…
Mechanisms of nonthermal destruction of the superconducting state and melting of the charge-density-wave state by femtosecond laser pulses
L. Stojchevska, P. Kusar, T. Mertelj +4
The processes leading to nonthermal condensate vaporization and charge-density wave (CDW) melting with femtosecond laser pulses is systematically investigated in different material…
Quasiparticle relaxation dynamics in spin-density-wave and superconducting SmFeAsO_{1-x}F_{x} single crystals
T. Mertelj, P. Kusar, V. V. Kabanov +7
We investigate the quasiparticle relaxation and low-energy electronic structure in undoped SmFeAsO and near-optimally doped SmFeAsO_{0.8}F_{0.2} single crystals - exhibiting spin-d…
Electron-Phonon Coupling in High-Temperature Cuprate Superconductors Determined from Electron Relaxation Rates
C. Gadermaier, A. S. Alexandrov, V. V. Kabanov +7
We determined electronic relaxation times via pump-probe optical spectroscopy using sub-15 fs pulses for the normal state of two different cuprate superconductors.We show that the…
Controlled vaporization of the superconducting condensate in cuprate superconductors sheds light on the pairing boson
P. Kusar, V. V. Kabanov, S. Sugai +3
We use ultrashort intense laser pulses to study superconducting state vaporization dynamics in La(2-x)Sr(x)CuO4 (x=0.1 and 0.15) on the femtosecond timescale. We find that the ener…