[23a-12P-1~6] 11.1 Fundamental properties

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[23a-12P-6] Electrical control of YBCO Josephson junctions made by He-FIB

〇Tetsuro Misawa¹, Tomoaki Nozaki^1,2, Shigeyuki Ishida¹, Shinichi Ogawa¹, Yukinori Morita¹, Hiroshi Eisaki¹, Shin-ichi Uchida³, Taichiro Nishio², Chiharu Urano¹ (1.AIST, 2.Tokyo Univ. of Sci., 3.Tokyo Univ.)

Keywords:

superconductivity,high critical temperature superconductor,helium ion microscope

In recent developments, the fabrication of tunnel barriers for YBCO Josephson junctions has become achievable through the irradiation of a thin film sample with a focused helium ion beam. In the context of Josephson junction arrays, it is of great importance to produce multiple junctions with uniform characteristics but fully suppressing fluctuations in YBCO properties is challenging. Therefore, achieving precise control over the properties of each junction is favored. In this study, we attempted to control the characteristic properties of YBCO junctions through the application of high current.