Perovskite calcium manganate CaMnO3-δ is representative of an essential group semiconductors with unique physical phenomena including colossal magnetoresistance and thermoelectric properties. For the large-scale applications that require utilization oxide ceramics, polycrystalline materials’ properties such as conductivity can be controlled ultimately optimized through tuning ceramics sintering...

The effect of disorder in high-${T}_{\mathrm{c}}$ superconductors is investigated from the viewpoint photoinduced quasiparticle (QP) dynamics, obtained through time-resolved pump-probe spectroscopy. We perform measurements on an optimally doped (OPD) ${\mathrm{Bi}}_{2+x}{\mathrm{Sr}}_{2\ensuremath{-}x}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$ (Bi2212) with out-of-plane induced by...