| Autor: |
J. P. Remeika, K. H. Wetzler, A. S. Cooper, R. M. Fleming, Richard H. Howell, M. J. Fluss, Patrice E. A. Turchi, D. R. Harshman, Y.C. Jean, A.L. Wachs |
| Rok vydání: |
1988 |
| Předmět: |
|
| Zdroj: |
Physical review. B, Condensed matter. 38(1) |
| ISSN: |
0163-1829 |
| Popis: |
We report results of positron-electron momentum-distribution measurements of single-crystal ${\mathrm{La}}_{2}$Cu${\mathrm{O}}_{4}$ using two-dimensional angular correlation of positron-annihilation-radiation techniques. The data contain two components: a large (\AA{}85%), isotropic corelike electron contribution and a remaining anisotropic valence-electron contribution modeled using a linear combination of atomic orbitals-molecular orbital method and a localized ion scheme, within the independent-particle model approximation. This work suggests a ligand-field Hamiltonian to be justified for describing the electronic properties of perovskite materials. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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