Global Coherence and Grain Size in Superconducting Granular Films

Ren-ichi Yamada; Shingo Katsumoto; Shun-ichi Kobayashi

doi:10.1143/JPSJ.61.2656

Journal of the Physical Society of Japan

Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015

Global Coherence and Grain Size in Superconducting Granular Films

Ren-ichi Yamada, Shingo Katsumoto, Shun-ichi Kobayashi

著者情報

キーワード: superconductor-insulator transition, granular film, critical sheet resistance

ジャーナル認証あり

1992 年 61 巻 8 号 p. 2656-2659

DOI https://doi.org/10.1143/JPSJ.61.2656

詳細

抄録

Superconductor-insulator (S-I) transitions tuned by normal tunneling resistance or magnetic field in two-dimensional granular films of tin are investigated, with emphasis on the effect of grain size. We found that for 280 Å grains, the sheet resistance at the S-I boundary in a magnetic field-tunneling resistance plane is close to R_Q(≡h⁄4e²), while that for 1200 Å grains is much higher.