Santra, A. K. ; Sarma, D. D. ; Rao, C. N. R. (1991) Relation between the electronic structure and the superconductivity of cuprates as revealed by Cu 2p photoemission and theoretical investigations Physical Review B: Condensed Matter and Materials Physics, 43 (7). pp. 5612-5615. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v43/i7/p5612_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.43.5612
Abstract
Cu 2p core-level photoemission studies of La2-xSrxCuO4, BiPbSr2Y1−xCa1−xCu2O8, and other cuprates show that the relative intensity of the satellite varies with the composition in a direction opposite to that of the hole concentration, nh. The IS/IM−nh relations in the different cuprate series can be understood in terms of the Δ/tpd ratio, where Δ is the charge-transfer excitation energy and tpd is the hybridization strength between the Cu 3d and O 2p orbitals. Interestingly, the IS/IM ratio increases with the Δ/tpd ratio in the cuprates. At a given value of nh, e.g., around the value corresponding to maximum Tc, IS/IM increases in the same direction as Tc among the different series of cuprates, suggesting thereby that Tc itself may be determined by Δ/tpd.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 39946 |
Deposited On: | 20 May 2011 08:09 |
Last Modified: | 27 May 2011 12:04 |
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