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Resonant two-magnon Raman scattering in high-T-c cuprates (CROSBI ID 150729)

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Kupčić, Ivan Resonant two-magnon Raman scattering in high-T-c cuprates // Journal of Raman spectroscopy, 42 (2011), 5; 998-1006. doi: 10.1002/jrs.2792

Podaci o odgovornosti

Kupčić, Ivan

engleski

Resonant two-magnon Raman scattering in high-T-c cuprates

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.

Raman scattering ; cuprate superconductors

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Podaci o izdanju

42 (5)

2011.

998-1006

objavljeno

0377-0486

10.1002/jrs.2792

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Fizika

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