2008/05/06 by P. Kusar, P. Kušar, V. V. Kabanov +6 · 1 citation
Physics and Astronomy · #Advanced Chemical Physics Studies #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.101.227001
published as Phys. Rev. Lett. 101, 227001 (2008) · 5 pages of article plus 4 pages of supplementary material
arxiv created 2008/05/06 · openalex publication_date 2008/11/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We use ultrashort intense laser pulses to study superconducting state vaporization dynamics in La_2\ensuremath-xSrxCuO4 (x=0.1 and 0.15) on the femtosecond time scale. We find that the energy density required to vaporize the superconducting state is 2.0\ifmmode±\else\textpm\fi0.8 and 2.6\ifmmode±\else\textpm\fi1.0 K/Cu for x=0.1 and 0.15, respectively. This is significantly greater than the condensation energy density, indicating that the quasiparticles share a large amount of energy with the boson glue bath on this time scale. Considering in detail both spin and lattice energy relaxation pathways which take place on the relevant time scale of \ensuremath∼10^\ensuremath-12 s, the experiments appear to favor phonon-mediated pair-breaking mechanisms over spin-mediated pair breaking.