中文摘要：

采用Nd：YAG固体激光器在SrTiO3（STO）衬底上成功制备了具有c轴取向的过掺杂La1.8Sr0.2CuO4和欠掺杂La1.9Sr0.1CuO4超导薄膜。分别对薄膜的晶体结构、电学输运性能进行了研究。通过晶体结构分析表明超导薄膜沿〈001〉晶向生长,沉积后的薄膜超导转变温度（TC）随着薄膜厚度（20～200 nm）的增加而逐渐升高,显示薄膜由二维特征向三维特征过渡。在双层薄膜La1.8Sr0.2CuO4/La1.9Sr0.1CuO4结构中,其电学输运性能和所加电场的方向有很大关联,反映出电场的方向影响了超导薄膜中空穴载流子的扩散,进而影响了薄膜的超导转变温度和电学输运性能。

英文摘要：

The high quality overdoped La1.8Sr0.2CuO4 and underdoped La1.9Sr0.1CuO4 films were deposited on（001） SrTiO3 substrate by pulsed laser deposition technique（PLD）,and the XRD and home-made electrical transport properties measurement system were employed to study crystal structure and electrical transport properties separately.The results showed all the films being c-axis orientation,and when the film thickness increased from 20 to 200 nm,the superconductor transition temperature（TC） increased,which meant that the characteristics of the film change from two-dimensional features to three-dimensional features.For La1.8Sr0.2CuO4/La1.9Sr0.1CuO4 bilayer film,the electrical transport properties were characterized and the rectifying properties were observed in such structure.The electrical behaviors of superconducting bilayer film are mainly caused by electric-field-driven migration of holes.