Abstract
We analyse the dynamical density fluctuation spectra for cuprates starting from the t —J model in a slave-boson 1/N representation. The results obtained are consistent with diagonalization studies and show novel low-energy structure on the energy scale J + δt due to the correlated motion of holes in a RVB spin liquid. The low-energy response implies an anomalous renormalization of several phonon modes. Here we discuss the renormalization of the highest breathing phonons in La2-x ;Sr x ;CuO4,
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Horsch, P., Khaliullin, G. (2001). Density Response of Cuprates and Renormalization of Breathing Phonons. In: Bonča, J., Prelovšek, P., Ramšak, A., Sarkar, S. (eds) Open Problems in Strongly Correlated Electron Systems. NATO Science Series, vol 15. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0771-9_9
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DOI: https://doi.org/10.1007/978-94-010-0771-9_9
Publisher Name: Springer, Dordrecht
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