Electrical conductivity through a single atomic step measured with the proximity-induced superconducting pair correlation

Kim, H.*; Lin, S.-Z.*; Graf, M.*; Miyata, Yoshinori*; Nagai, Yuki; Kato, Takeo*; Hasegawa, Yukio*

Physical Review Letters, 117(11), p.116802_1 - 116802_5, 2016/09

https://doi.org/10.1103/PhysRevLett.117.116802

no abstracts in English

Imaging Josephson vortices on the surface superconductor Si(111)-()-In using a scanning tunneling microscope

Yoshizawa, Shunsuke*; Kim, H.*; Kawakami, Takuto*; Nagai, Yuki; Nakayama, Tomonobu*; Hu, X.*; Hasegawa, Yukio*; Uchihashi, Takashi*

Physical Review Letters, 113(24), p.247004_1 - 247004_5, 2014/12

https://doi.org/10.1103/PhysRevLett.113.247004

We have studied the superconducting Si(111)-()-In surface using a He-based low-temperature scanning tunneling microscope. Zero-bias conductance images taken over a large surface area reveal that vortices are trapped at atomic steps after magnetic fields are applied. The crossover behavior from Pearl to Josephson vortices is clearly identified from their elongated shapes along the steps and significant recovery of superconductivity within the cores. Our numerical calculations combined with experiments clarify that these characteristic features are determined by the relative strength of the interterrace Josephson coupling at the atomic step.

Superconducting Pb island nanostructures studied by scanning tunneling microscopy and spectroscopy

Nishio, Takahiro*; An, Toshu*; Nomura, Atsushi*; Miyachi, Kosuke*; Eguchi, Toyoaki*; Sakata, Hideaki*; Lin, S.*; Hayashi, Nobuhiko; Nakai, Noriyuki; Machida, Masahiko; et al.

Physical Review Letters, 101(16), p.167001_1 - 167001_4, 2008/10

https://doi.org/10.1103/PhysRevLett.101.167001

Superconductivity of nanosized Pb-island structures whose radius is 0.8 to 2.5 times their coherence length was studied under magnetic fields using low-temperature scanning tunneling microscopy and spectroscopy. Spatial profiles of superconductivity were obtained by conductance measurements at zero-bias voltage. Critical magnetic fields for vortex penetration and expulsion and for superconductivity breaking were measured for each island. The critical fields depending on the lateral size of the islands and existence of the minimum lateral size for vortex formation were observed.

Conceptual design of backend technology R & D facility for TRU recycle in the future cycle system

Fujine, Sachio; Usuda, Shigekazu; Morita, Yasuji; Yoshida, Zenko; ; Furuta, Teruo; Tone, Tatsuzo; *; Nishimura, Kenji*; *

JAERI-M 93-211, 87 Pages, 1993/11

JAERI-M-93-211.pdf:2.42MB

no abstracts in English

Mechanical test ofsuperconducting magnet system for fusion experimental reactor

Sugimoto, Makoto; Yoshida, Kiyoshi; Hasegawa, Mitsuru*; Koizumi, Koichi; Nakajima, Hideo; *; *; *; Yasukawa, Yukio*; Sasaki, Takashi*; et al.

Fusion Technology 1990, p.1530 - 1534, 1991/00

no abstracts in English

Treatment of the Elastic Removal Cross Sections in Na-Fe Resonance Region and a One Dimensional Code EXPANDA-70DRA

; ;

JAERI-M 6081, 54 Pages, 1975/03

JAERI-M-6081.pdf:1.53MB

no abstracts in English