Photoemission search for the superconducting energy gap of high-Tc YBa2Cu3O7
E. R. Moog, S. D. Bader, A. J. Arko, B. K. Flandermeyer
DOI 10.1103/PhysRevB.36.5583 · Physical Review B
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Abstract
Photoemission data (hν=21.2 eV) are reported for the high-Tc superconductor YBa2Cu3O7 above and well below Tc and examined for effects due to the formation of the superconducting energy gap. To guide expectations, simulations are also presented based on a BCS quasiparticle excitation expression broadened by a 30-meV experimental resolution. Comparison of the experimental Fermi-edge spectra with the calculations indicates either that the surface region probed is not superconducting or that the superconductivity is in the extreme gapless limit.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | midpoint |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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