Superconducting Pb island nanostructures studied by scanning tunneling microscopy and spectroscopy

Takahiro Nishio, Toshu An, Atsushi Nomura, Kousuke Miyachi, Toyoaki Eguchi, Hideaki Sakata, Shizeng Lin, Nobuhiko Hayashi, Noriyuki Nakai, Masahiko Machida, Yukio Hasegawa

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number167001
JournalPhysical Review Letters
Volume101
Issue number16
DOIs
Publication statusPublished - 2008 Oct 14
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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