Internal pressure in superconducting Cu intercalated Bi$_2$Se$_3$

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

doi:10.1103/PhysRevB.93.064505

Internal pressure in superconducting Cu intercalated Bi$_2$Se$_3$

Superconductivity 2016-03-23 v1 Strongly Correlated Electrons

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

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Abstract

Angle-resolved photoemission spectroscopy is used to study the band-structure of superconducting electrochemically intercalated Cu $_x$ Bi $_2$ Se $_3$ . We find that in these samples the band-gap at the $\Gamma$ point is much larger than in pristine Bi $_2$ Se $_3$ . 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 Cu $_x$ Bi $_2$ Se $_3$ .

Keywords

angle-resolved photoemission spectroscopy copper intercalation Bi2Se3 internal pressure internal stress superconductivity band structure

Cite

@article{arxiv.1601.06954,
  title  = {Internal pressure in superconducting Cu intercalated Bi$_2$Se$_3$},
  author = {Amit Ribak and Khanan B. Chashka and Elias Lahoud and Muntaser Naamneh and Shahar Rinott and Yair Ein-Eli and Nicholas C. Plumb and Ming Shi and Emile Rienks and Amit Kanigel},
  journal= {arXiv preprint arXiv:1601.06954},
  year   = {2016}
}

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To be published in PRB

Internal pressure in superconducting Cu intercalated Bi$_2$Se$_3$

Abstract

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