Resonant photoemission spectroscopy of the quenched superconductivity system: Y1−xPrxBa2Cu3O7−δ single crystals
J.-S. Kang, S. Haffner, C. G. Olson, J. H. Kim, M. B. Maple, S. K. Kwon, B. I. Min
DOI 10.1103/PhysRevB.66.052503 · Physical Review B
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Abstract
The electronic structures of the quenched superconductivity system Y1−xPrxBa2Cu3O7−δ (YPrBCO; x=0, 0.4, 0.8) have been investigated by resonant photoemission spectroscopy (PES) measurements near the Pr 4d→4f absorption edge. With increasing x, PES data exhibit a binding-energy shift away from EF. The fine structures of YPrBCO (x=0.8) are very similar to those of trivalent PrF3, providing evidence that Pr ions in YPrBCO are predominantly in Pr 3+ states. Comparison of the PES spectra of YPrBCO with x=0.8 to the electronic structure for PrBa2Cu3O7 obtained by using the local spin-density functional approximation incorporating the Coulomb correlation shows good agreement in the bandwidths and the peak positions of the Cu d and O p states.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y1-xPrxBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | 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 |
| PrBa2Cu3O7 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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