Concomitance of superconducting spin–orbit scattering length and normal state spin diffusion length in W on (Bi,Sb)2Te3

Yong Chang Lau, Ryota Akiyama, Hishiro T. Hirose, Ryosuke Nakanishi, Taichi Terashima, Shinya Uji, Shuji Hasegawa, Masamitsu Hayashi

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We report the observation of an anomalously large in-plane upper critical field, exceeding at least 2.5 times the Pauli paramagnetic limit, in a thin superconducting W film grown on a topological insulator (Bi,Sb)2Te3. This can be accounted for by setting the spin–orbit scattering length of superconducting W to a value ranging from 1 to 2 nm, which is comparable to the spin diffusion length of normal state W. The coupling between the topological surface states of (Bi,Sb)2Te3 and the wave functions of superconducting W may also contribute to the observed giant critical field. Our results suggest the universality of the spin–orbit scattering formalism for describing the transport involving the diffusive carriers as well as the Cooper pairs in systems with strong spin–orbit coupling.

本文言語English
論文番号034001
ジャーナルJPhys Materials
3
3
DOI
出版ステータスPublished - 2020 7月
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 原子分子物理学および光学

フィンガープリント

「Concomitance of superconducting spin–orbit scattering length and normal state spin diffusion length in W on (Bi,Sb)2Te3」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル