| Conţinutul numărului revistei |
| Articolul precedent |
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 120 0 |
 SM ISO690:2012TEMPERE, Jacques, FOMIN, Vladimir, DEVREESE, Josef T.. Bipolaron dispersion in anisotropic high-tc superconductors: Relevance to neutron scattering. In: Solid State Communications, 1997, vol. 101, pp. 661-664. ISSN 0038-1098. DOI: https://doi.org/10.1016/S0038-1098(88)80000-0 |
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  Solid State Communications |
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| Volumul 101 / 1997 / ISSN 0038-1098 /ISSNe 1879-2766 | ||||||
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| DOI:https://doi.org/10.1016/S0038-1098(88)80000-0 | ||||||
| Pag. 661-664 | ||||||
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Neutron scattering experiments on superconducting YBa2Cu3O6+x reveal that the scattering vanishes for energy transfers above approximately 50 meV. In order to examine Alexandrov's suggestion [1] that the disappearance of magnetic scattering is due to the narrowness of the bipolaron band, we present a variational method which can be used to investigate the bipolaron energy dispersion in anisotropic materials. The method is then applied to a model of bipolarons in YBa2Cu3O7 and a value for the bipolaron energy bandwidth is found compatible with that derived from neutron scattering experiments. |
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| Cuvinte-cheie A. High-Tc, D. Electron-phonon interactions, D. Electronic band structure, E. Neutron scattering, superconductors |
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