Abundant photoelectronic behaviors of La 0.67 Sr 0.33 MnO 3 /Nb:SrTiO 3 junctions
Abundant photoelectronic behaviors of La 0.67 Sr 0.33 MnO 3 /Nb:SrTiO 3 junctions
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DOI：
10.1088/1674-1056/26/7/077302
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发表时间：
2017-06
影响因子：
1.7
通讯作者：
Hailin Huang;Denghong Wang;Hongrui Zhang;Hui Zhang;C. Xiong;Jirong Sun;B. Shen
中科院分区：
文献类型：
--
作者：
Hailin Huang;Denghong Wang;Hongrui Zhang;Hui Zhang;C. Xiong;Jirong Sun;B. Shen
系统地研究了La0.67Sr0.33MnO3/Nb：SrTiO3(LSMO/Ston)结(LSMO/Ston)的整流特性和光电特性与温度的关系。实验表明，该结具有良好的整流性能。观察到LSMO/Ston结之间的光电子发射特性存在显著差异。对于较厚的LSMO薄膜，当温度从300K下降到13K时，光电流呈现单调增长，而对于超薄的LSMO薄膜，光电流的行为更为复杂。随着温度的降低，光电流迅速增大到最大值，然后平稳地减小。这一反常现象可以用光载体的扩散和复合模型来解释。
Temperature dependence on rectifying and photoelectronic properties of La0.67Sr0.33MnO3/Nb:SrTiO3 (LSMO/STON) junctions with the thickness values of LSMO film varying from 1 nm to 54 nm are systematically studied. As shown experimentally, the junctions exhibit good rectifying properties. The significant differences in photoemission property among the LSMO/STON junctions are observed. For the junction in a thicker LSMO film, the photocurrent shows a monotonic growth when temperature decreases from 300 K to 13 K. While for the junction in an ultrathin LSMO film, the behaviors of photocurrent are more complicated. The photocurrent increases rapidly to a maximum and then smoothly decreases with the decrease of temperature. The unusual phenomenon can be elucidated by the diffusion and recombination model of the photocarrier.