Reversal transient laser-induced voltages in La2/3Ca1/3MnO3 films  

作　　者：赵昆 何萌 吕惠宾 

机构地区：[1]Department of Mathematics and Physics, China University of Petroleum, Beijing 102249, China [2]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China [3]International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China

出　　处：《Chinese Physics B》2007年第3期840-842,共3页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant Nos 60576015 and 50672132）.

摘　　要：This paper reports that the transient laser-induced voltages have been observed in La2/3Ca1/3MnO3 thin films on MgO （001） in the absence of an applied current. A peak voltage of - 0.15 V was detected in response to 0.015J pulse of 308 nm laser. It is demonstrated that the signal polarity is reversed when the films are irradiated through the substrate rather than at the air/film interface. Off-diagonal thermoelectricity may support the inversion of the signal when the irradiation direction is reversed.This paper reports that the transient laser-induced voltages have been observed in La2/3Ca1/3MnO3 thin films on MgO （001） in the absence of an applied current. A peak voltage of - 0.15 V was detected in response to 0.015J pulse of 308 nm laser. It is demonstrated that the signal polarity is reversed when the films are irradiated through the substrate rather than at the air/film interface. Off-diagonal thermoelectricity may support the inversion of the signal when the irradiation direction is reversed.

关 键 词：manganite oxide thin film photovoltaic effect 

分 类 号：TN304.21[电子电信—物理电子学]