Scientific article

Q-dependence of spin excitations in high-TC cuprates from spin–phonon coupling

Published inJournal of physics. Condensed matter, vol. 21, 142202
Publication date2009

An understanding of spin excitations in cuprates is essential since the mechanism of high-TC superconductivity might be linked to spin fluctuations. Band calculations for ‘one-dimensional' unit cells of La2CuO4 show larger coupling (spin–phonon coupling, SPC) between anti-ferromagnetic spin waves and O-phonons than for Cu- or La-phonons. When this result is applied to a two-dimensional, free-electron like band, it leads to an ‘hourglass' shape of the spin excitation spectrum, as in recent experiments. Isotope shifts and doping dependences of the excitations are discussed.

Research group
Citation (ISO format)
JARLBORG, Thomas N. Q-dependence of spin excitations in high-T<sub>C</sub> cuprates from spin–phonon coupling. In: Journal of physics. Condensed matter, 2009, vol. 21, p. 142202. doi: 10.1088/0953-8984/21/14/142202
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Article (Published version)
ISSN of the journal0953-8984

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