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American Physical Society, Physical review B, 6(93)

DOI: 10.1103/physrevb.93.064505

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Internal pressure in superconducting Cu-intercalatedBi2Se3

Journal article published in 2016 by Amit Ribak, Khanan B. Chashka, Elias Lahoud, Muntaser Naamneh, Shahar Rinott, Yair Ein-Eli, Nicholas C. Plumb ORCID, Ming Shi, Emile Rienks, Amit Kanigel
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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.