TY - JOUR
T1 - Ba core-level shift in x-ray photoemission spectroscopy on single-phase Y1-xPrxBa2Cu3O7 and YBa2Cu3O7-y compounds
AU - Yang, In Sang
AU - Schrott, A. G.
AU - Tsuei, C. C.
PY - 1990
Y1 - 1990
N2 - We have measured x-ray photoemission spectra of single-phase Y1-xPrxBa2Cu3O7 (x=0.0, 0.2, 0.4, 0.6, 0.8) and of YBa2Cu3O7-y (y=0.0, 0.15, 0.40) compounds, in which superconductivity is suppressed by increasing x and y. Ba 3d and Ba 4d core-level spectra were observed to shift significantly towards higher binding energy as x and y increase, while Y 3d, Cu 3p, O 1s spectra were not. The shift of Ba core-level spectra is interpreted as resulting from a distinct initial-state Ba 5d-Od 2p covalency common to 1:2:3 structures, as opposed to final-state effects. This energy shift may constitute a sensitive fingerprint of the degree of hole localization at Ba sites, which is related to the quenching of superconductivity in these compounds.
AB - We have measured x-ray photoemission spectra of single-phase Y1-xPrxBa2Cu3O7 (x=0.0, 0.2, 0.4, 0.6, 0.8) and of YBa2Cu3O7-y (y=0.0, 0.15, 0.40) compounds, in which superconductivity is suppressed by increasing x and y. Ba 3d and Ba 4d core-level spectra were observed to shift significantly towards higher binding energy as x and y increase, while Y 3d, Cu 3p, O 1s spectra were not. The shift of Ba core-level spectra is interpreted as resulting from a distinct initial-state Ba 5d-Od 2p covalency common to 1:2:3 structures, as opposed to final-state effects. This energy shift may constitute a sensitive fingerprint of the degree of hole localization at Ba sites, which is related to the quenching of superconductivity in these compounds.
UR - http://www.scopus.com/inward/record.url?scp=0043209375&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.41.8921
DO - 10.1103/PhysRevB.41.8921
M3 - Article
AN - SCOPUS:0043209375
SN - 0163-1829
VL - 41
SP - 8921
EP - 8926
JO - Physical Review B
JF - Physical Review B
IS - 13
ER -