【摘要】 基于传统的mesa结构制备工艺 ,我们通过精确控制实验参数的手段 ,在Bi2 Sr2 CaCu2 O8+x单晶上实现了仅含有少数几个结的本征结的制备工艺 ,结的临界电流具有很好的一致性 .结的数目最少达到 2个 (包括表面结) ;结数目控制误差为±1个 .更多还原

【Abstract】 With low etching rates of Argon ion milling, conventional fabrication process is improved by precisely measuring or controlling the parameters of the fabrication, which include the thickness of silver layer and the time and rates of etching process. We obtained intrinsic Josephson junctions of mesa structure, the number of junctions in which is controllable with the error within ±1. The minimum number we obtained is only 2 with the consideration of the existence of the surface junction. The critical current of each junction in the stack is quite consistent.更多还原