STEP-EDGE AND STACKED-HETEROSTRUCTURE HIGH-T-C JOSEPHSON-JUNCTIONS FOR VOLTAGE-STANDARD ARRAYS

被引:12
|
作者
BENZ, SP [1 ]
REINTSEMA, CD [1 ]
ONO, RH [1 ]
ECKSTEIN, JN [1 ]
BOZOVIC, I [1 ]
VIRSHUP, GF [1 ]
机构
[1] VARIAN ASSOCIATES INC,EL GINZTON RES CTR,PALO ALTO,CA 94304
关键词
D O I
10.1109/77.403202
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We have explored two high-transition-temperature Josephson junction technologies for application in voltage standard arrays: step-edge junctions made with YBa2Cu3O7-delta and Au normal-metal bridges, and stacked series arrays of Josephson junctions in selectively doped, epitaxially grown Bi2Sr2CaCu2O8 heterostructures. For both kinds of junctions, Shapiro steps induced by a microwave bias were characterized as a function of power. We compare the two technologies with respect to critical current and normal resistance uniformity, maximum achievable critical current, critical-current normal-resistance product, and operating temperature.
引用
收藏
页码:2915 / 2918
页数:4
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