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
DOI 10.1103/PhysRevB.93.064505 · Physical Review B
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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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Cu0.27Bi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.8 | Pressure not reported | onset |
| Cu0.27Bi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.8 | Pressure not reported | onset |
| Cu0.23Bi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.8 | Pressure not reported | unknown |
| Bi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | 11 GPa | unknown |
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