首页|Co-doped BaFe2As2 Josephson junction fabricated with a focused helium ion beam

Co-doped BaFe2As2 Josephson junction fabricated with a focused helium ion beam

扫码查看
原文链接
  • 万方数据
Josephson junction plays a key role not only in studying the basic physics of unconventional iron-based supercon-ductors but also in realizing practical application of thin-film based devices,therefore the preparation of high-quality iron pnictide Josephson junctions is of great importance.In this work,we have successfully fabricated Josephson junctions from Co-doped BaFe2As2 thin films using a direct junction fabrication technique which utilizes high energy focused helium ion beam(FHIB).The electrical transport properties were investigated for junctions fabricated with various He+irradiation doses.The junctions show sharp superconducting transition around 24 K with a narrow transition width of 2.5 K,and a dose correlated foot-structure resistance which corresponds to the effective tuning of junction properties by He+irradia-tion.Significant Jc suppression by more than two orders of magnitude can be achieved by increasing the He+irradiation dose,which is advantageous for the realization of low noise ion pnictide thin film devices.Clear Shapiro steps are ob-served under 10 GHz microwave irradiation.The above results demonstrate the successful fabrication of high quality and controllable Co-doped BaFe2 As2 Josephson junction with high reproducibility using the FHIB technique,laying the foun-dation for future investigating the mechanism of iron-based superconductors,and also the further implementation in various superconducting electronic devices.

focused helium ion beamCo doped BaFe2As2Josephson junction

陈紫雯、张焱、马平、徐中堂、李宇龙、王越、路建明、马衍伟、甘子钊

展开 >

Applied Superconductivity Research Center,Peking University,Beijing 100871,China

State Key Laboratory for Artificial Microstructure and Mesoscopic Physics,Peking University,Beijing 100871,China

Institute of Condensed Matter Physics,School of Physics,Peking University,Beijing 100871,China

Yangtze Delta Institute of Optoelectronics,Peking University,Beijing 100871,China

Key Laboratory of Applied Superconductivity,Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China

展开 >

国家重点研发计划国家重点研发计划国家自然科学基金国家自然科学基金

2020YFF010147062017YFC06019016157101952177026

2024

10.1088/1674-1056/ad21f7

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(4)
  • 36