Internal pressure in superconducting Cu-intercalated Bi2Se3

Amit Ribak, Khanan B. Chashka, Elias Lahoud, Muntaser Naamneh, Shahar Rinott, Yair Ein-Eli, Nicholas C. Plumb, Ming Shi, Emile Rienks, Amit Kanigel

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Angle-resolved photoemission spectroscopy is used to study the band structure of superconducting electrochemically intercalated CuxBi2Se3. We find that in these samples, the band gap at the Γ point is much larger than in pristine Bi2Se3. Comparison to the results of band structure calculations indicates that the origin of this large gap is internal stress caused by disorder created by the Cu intercalation. We suggest that the internal pressure may be necessary for superconductivity in CuxBi2Se3.

Original languageEnglish
Article number064505
JournalPhysical Review B
Volume93
Issue number6
DOIs
StatePublished - 5 Feb 2016
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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