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- Title
Strong Spin Triplet Contribution of the First Removal State in the Insulating Regime of Bi<sub>2</sub>Sr<sub>2</sub>Ca<sub>1 – </sub><sub>x</sub>Y<sub>x</sub>Cu<sub>2</sub>O<sub>8 + δ</sub>.
- Authors
Janowitz, C.; Seidel, U.; Unger, R.-S. T.; Krapf, A.; Manzke, R.; Gavrichkov, V.; Ovchinnikov, S.
- Abstract
The experimental dispersion of the first removal state in the insulating Bi2Sr2Ca1 – xYxCu2O8 + δ regime is found to differ significantly from that of other parent materials: oxyclorides and La2CuO4. For Y contents of 0.92≥x≥0.55 due to nonstoichiometric effects in the Bi–O layers, the hole concentration in the CuO2 layers is almost constant and, on the contrary, the crystal lattice parameters a,b,c change very strongly. This (a,b) parameter increase and c parameter decrease results in an unconventional three peak structure at (0, 0), (π/2,π/2),(π,π) for x = 0.92. We can describe the experimental data only beyond the framework of the three-band p–d-model involving the representations of a new triplet counterpart for the Zhang–Rice singlet state. © 2004 MAIK “Nauka/Interperiodica”.
- Subjects
HOLES (Electron deficiencies); CRYSTAL lattices; MATHEMATICAL crystallography; REACTIVE oxygen species; IONIZATION of gases; TRIPLET state (Quantum mechanics)
- Publication
JETP Letters, 2004, Vol 80, Issue 10, p692
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.1862796