Photo-Induced Carrier Dynamics of YBa2Cu3O7-δ Thin Films
Our newly developed technique called “transient thermoelectric effect (TTE)” method using a pulsed laser has been successfully employed to study a carrier dynamics of YBa2CU3O7-δ films. The photo-induced TTE voltages show a multiple relaxation process; a normal electron-hole recombination process in the 1D CuO chains and thermal diffusions of the photo-generated light and heavy holes (“quasiparticles”) arising from the metallic 2D CuO2 plane. Furthermore, we have found anomalous behaviors in the TTE decay curves around 35 and 200 K.
KeywordsLaser Intensity Heavy Hole Oxide Superconductor High Laser Intensity Conduction Carrier
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