Sarma, D. D., Krishnamurthy, H. R., Nimkar, S., Ramasesha, S., Mitra, P. P., Ramakrishnan, T. V. (1992) Electronic structure of high-Tc superconductors and related compounds. Pramana, 38 (5). L531-L538. ISSN 03044289 (ISSN)
Abstract
We study a 5-band Hubbard model for the CuO2 planes in cuprate super-conductors using Hartree-Fock mean-field theory including spiral spin density waves. For the half-filled case we recover a ZSA-like phase diagram but with an additional new region characterized by strong covalency effects, which we call a covalent insulator region. We also provide a nonperturbative calculation of Jeff, the effective in-plane antiferromagnetic interaction, as a function of parameters of the model. We suggest that the high-Tc cuprates are in or very close to the covalent insulator region and within this we show that a consistent explanation of apparently conflicting high energy spectroscopic and magnetic measurements of the high-Tc cuprates can be given. © 1992 Indian Academy of Sciences.
| Item Type: | Paper |
|---|---|
| Uncontrolled Keywords: | 71.10 71.30 74.70 75.10 covalency Electronic structure oxide superconductors phase diagram transition metal compounds |
| Subjects: | physics |
| CSHL Authors: | |
| Communities: | CSHL labs > Mitra lab |
| Depositing User: | CSHL Librarian |
| Date: | 1992 |
| Date Deposited: | 02 Apr 2012 20:13 |
| Last Modified: | 10 Feb 2017 20:50 |
| URI: | https://repository.cshl.edu/id/eprint/25874 |
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