Al_2O_3隧道结势垒参数与上电极金属的相关性  

CORRELATION BETWEEN BARRIER PARAMETERS OF AI_2O TUNNEL JUNCTION AND TOP ELECTRODE METAL

作　　者：马文淦[1] 林趾荣 张桂根[1] 舒启清[2] 郑克勤[2] 

机构地区：[1]中国科学技术大学近代物理系,合肥230026 [2]重庆大学应用物理系,重庆630000

出　　处：《物理学报》1991年第3期483-489,共7页Acta Physica Sinica

基　　金：国家自然科学基金

摘　　要：本文采用两种极端情况的梯形势垒模型对上电极分别为Au,Ag和Cu的三种Al-Al_2O_3-M隧道结势垒参数进行了研究,通过用上述模型对77K温度下结的伏安特性进行拟合计算表明:这两种模型都能很好地解释实验结果;所得到的势垒参数表现出与结上电极金属的原子半径、金属材料的脱出功以及Al_2O_3绝缘介质的电子亲合势有关。Models of trapezoidal barrier in two extreme cases are used in this paper to study barrier parameters of A1-A12O3-M tunnel junctions, the top electrodes of which are Au, Ag and Cu, respectively. From the fitting calculation of V-I characteristics of the above junctions at 77 K, we find that both models can explain the experimental results very well, and the barrier parameters correlate with the atom radius of top electrode metal, the work function of top electrode metal material and the electron affinity to isolarer medium A12O3, respectively.

关 键 词：AL2O3 隧道结 势垒参数 上电极 

分 类 号：O482.4[理学—固体物理]