高温超导Tl_(2)Ba_(2)CaCu_(2)O_(8)斜切本征结特性研究  

Study on properties of high-temperature superconducting Tl_(2)Ba_(2)CaCu_(2)O_(8) intrinsic Josephson junction in a misaligned substrate

作　　者：赵生辉 田王昊 何泽 梁雪连 季鲁[1] 何明[1,3] 王华兵 Zhao Shenghui;Tian Wanghao;He Ze;Liang Xuelian;Ji Lu;He Ming;Wang Huabing(College of Electronic Information and Optical Engineering,Nankai University,Tianjin 300350,China;Research Institute of Superconductor Electronics,Nanjing University,Nanjing 210093,China;Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,Tianjin 300350,China)

机构地区：[1]南开大学电子信息与光学工程学院,天津300350 [2]南京大学超导电子学研究所,南京210093 [3]天津市光电传感器与传感网络技术重点实验室,天津300350

出　　处：《低温与超导》2021年第5期30-34,共5页Cryogenics and Superconductivity

基　　金：国家自然科学基金(61727805,11961141002)资助。

摘　　要：在铝酸镧(LaAlO_(3))斜切衬底上制备了Tl_(2)Ba_(2)CaCu_(2)O_(8)(Tl-2212)本征约瑟夫森结微桥,对其进行了输运特性研究。测试了样品在不同测量温度下的电流电压(I-V)曲线,结合模型仿真结果对临界电流特性进行了研究分析。利用低温扫描激光显微镜(LTSLM)初步探讨了Tl-2212本征结微桥的温度空间分布特性,观察到样品中出现热域并随着偏置电流的变化而变化。Intrinsic Josephson junctions microbridges were fabricated in Tl_(2)Ba_(2)CaCu_(2)O_(8)(Tl-2212) thin film on a misaligned LaAlO_(3) substrate and the transport characteristics of the sample were analyzed. The I-V curves of the sample were measured at different temperatures, and the critical current characteristics were studied based on the results of model simulation. The temperature spatial distribution characteristics of the sample were preliminarily explored by low temperature scanning laser microscope(LTSLM). Thermal domains were observed and it changed with the variation of bias current.

关 键 词：本征约瑟夫森结 Tl-2212高温超导薄膜 LTSLM 

分 类 号：O511[理学—低温物理]