Temperature and fluence dependence of the transient photoinduced reflectivity and the magnetooptical Kerr angle was measured in two Pr0.6Ca0.4MnO3 thin films subject to tensile and compressive substrate-induced strain. A photoinduced transient ferromagnetic metallic (TFM) phase is found to form below 60 and 40 K in the substrate-strained and substrate-compressed films, respectively.
COBISS.SI-ID: 23175207
We investigate the quasiparticle relaxation and low-energy electronic structure in a near-optimally doped pnictide superconductor with T c=49.5 K by means of femtosecond spectroscopy. Multiple relaxation processes are evident, with distinct superconducting state dynamics and a clear “pseudogap”-like feature with an onset above 180 K indicating the existence of a temperature-independent gap of magnitude ? PG=61±9 meV above and below T c. The fluence and temperature dependence of the superconducting state dynamics shows similar behaviour to the cuprate superconductors.
COBISS.SI-ID: 22567207