Superconductivity of Pb ultrathin film on Ge(111) surface

Haruko Toyama, Hongrui Huang, Tomonori Nakamura, Leonid V. Bondarenko, Alexandra Y. Tupchaya, Dimitry V. Gruznev, Akari Takayama, Andrey V. Zotov, Alexander A. Saranin, Shuji Hasegawa

研究成果: Conference contribution

1 引用 (Scopus)

抜粋

We have performed structure analysis and electrical conductivity measurements of Pb ultrathin films of different thicknesses grown on Ge(111) at low temperature by using electron diffraction, scanning tunneling microscopy, and in-situ four-point probe method in ultrahigh vacuum. Three samples with different deposition amounts of Pb corresponding to 1, 3 and 10 monolayer (ML) were revealed to have different structures. The 1 ML-Pb sample, having a wetting layer and tiny clusters on it, did not show superconductivity. The 10-ML-Pb sample, consisted of continuous Pb(111) thin film structure, showed thin-film superconductivity around 6 K. The 3-ML-Pb sample, consisted of the wetting layer with unconnected Pb(111) islands on it, also showed superconductivity around 4 K. This superconductivity is thought to be induced in the wetting layer by proximity effect from superconducting Pb(111) islands. Thus, it is important to study the detailed growth structures for understanding atomic-layer superconductivity.

元の言語English
ホスト出版物のタイトルPhysics and Technology of Nanostructured Materials
編集者Nikolay G. Galkin
出版者Trans Tech Publications Ltd
ページ80-85
ページ数6
386 DDF
ISBN(印刷物)9783035714777
DOI
出版物ステータスPublished - 2018 1 1
外部発表Yes
イベント4th Asian School-Conference on Physics and Technology of Nanostructured Materials, ASCO-Nanomat 2018 - Vladivostok, Russian Federation
継続期間: 2018 9 232018 9 28

Other

Other4th Asian School-Conference on Physics and Technology of Nanostructured Materials, ASCO-Nanomat 2018
Russian Federation
Vladivostok
期間18/9/2318/9/28

    フィンガープリント

ASJC Scopus subject areas

  • Radiation
  • Materials Science(all)
  • Condensed Matter Physics

これを引用

Toyama, H., Huang, H., Nakamura, T., Bondarenko, L. V., Tupchaya, A. Y., Gruznev, D. V., Takayama, A., Zotov, A. V., Saranin, A. A., & Hasegawa, S. (2018). Superconductivity of Pb ultrathin film on Ge(111) surface. : N. G. Galkin (版), Physics and Technology of Nanostructured Materials (巻 386 DDF, pp. 80-85). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/DDF.386.80