Angle-resolved photoemission spectroscopy of the low-energy electronic structure of superconducting Pr2CuO4 driven by oxygen nonstoichiometry
M. Horio, Y. Krockenberger, K. Koshiishi, S. Nakata, K. Hagiwara, M. Kobayashi, K. Horiba, H. Kumigashira, H. Irie, H. Yamamoto, A. Fujimori
DOI 10.1103/PhysRevB.98.020505 · Physical Review B
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Abstract
Bulk crystals of electron-doped cuprates with a T′-type structure require both Ce substitutions and reduction annealing for the emergence of superconductivity while reduction annealing alone can induce superconductivity in thin films of T′-type cuprates. In order to reveal the low-energy electronic states which are responsible for the superconductivity, we have conducted angle-resolved photoemission spectroscopy measurements on thin films of the superconducting Ce-free T′-type cuprate Pr2CuO4. The results indicate that the overall band structure and the Fermi surface area of the superconducting Pr2CuO4 are similar to those of superconducting Ce-doped bulk single crystals, highlighting the importance of the actual electron concentration rather than the Ce concentration when discussing the physical properties of T′-type cuprates.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pr2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25.5 | Pressure not reported | unknown |
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