Transverse laser-induced thermoelectric voltages in tilted La2-xSrxCuO4 thin films.

The transverse laser-induced thermoelectric voltages in the tilted La_2-xSr_xCuO₄ (LSCO) thin films are observed for the first time. The detected signals are demonstrated to originate from the anisotropy of thermoelectric power and depend on the Sr-doping level drastically. The largest voltage is observed in the LSCO films at x=0.15 under the irradiation of different lasers with the wavelength in the spectrum range from infrared to ultraviolet. The dependence of the signals on Sr-doping content is associated with a two dimensional charge transport behavior in LSCO films near the optimum doping content. [ABSTRACT FROM AUTHOR]