Ultraviolet Photoemission Study of High-Tc Superconductor (La1-xSrx)2CuO4-δ
- 1 April 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (4A), L349-351
- https://doi.org/10.1143/jjap.26.l349
Abstract
Ultraviolet photoemission spectra of high-T c superconductor (La1-x Sr x )2CuO4-δ, (x=0.075 and δ≤0.04) are presented. The experimental result was compared with the band calculations of La2CuO4 by Mattheiss and Takegahara et al. It was found that as regards the valence-band width (about 7 eV) the experiment and the calculations are in good agreement with each other, but the position of the calculated valence bands contributed mainly by weakly bonding Cu(3d)-O(2p) states are shiftd toward the lower binding energy by about 1 eV with respect to the experiment. The possible origins for this discrepancy were discussed.Keywords
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