Naslov
Resonant two-magnon Raman scattering in high-$T_c$ cuprates
(Resonant two-magnon Raman scattering in high-T-c cuprates)

Autori
Kupčić, Ivan

Izvornik
Journal of Raman spectroscopy (0377-0486) 42 (2011), 5; 998-1006

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Raman scattering ; cuprate superconductors

Sažetak
Resonance enhancement of one-phonon, two-phonon and two-magnon Raman scattering in a general exactly solvable multiband model is explained in a way that is in accordance with the general analytical properties of the total optical conductivity tensor. Using this approach, the charge transfer limit of the Emery three-band model is examined to explain resonance enhancement of the two-magnon Raman spectra of high-$T_c$ cuprates, found in experiments to be of three orders of magnitude. While previous Raman and optical-conductivity analyses of the cuprates, based on the single-band Hubbard model, are found to be consistent with the picture where one hole per one CuO$_2$ unit is localized on the Cu ion, the present three-band approach allows the study of the opposite, strong copper-oxygen hybridization limit, which is found to be in agreement with results of nuclear magnetic resonance and one-phonon Raman scattering experiments.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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