Abstract
The additional excitation observed in the phonon spectrum of La{sub 2}CuO{sub 4} is shown to arise from Cu charge fluctuations. A nonlinear breathing shell model is formulated for the coupling of these fluctuations with the lattice. The harmonic dynamics and exact nonlinear solutions are studied in a 2-D model of the CuO{sub 2} planes. A molecular dynamics simulation shows an additional peak of nonphononic character originated by the nonlinear lattice dynamics. (author). 20 refs, 3 figs.
Citation Formats
Dobry, A, Greco, A, Migoni, R, and Stachiotti, M.
Cu charge fluctuations and anomalous behaviour in the phonon spectrum of La{sub 2}CuO{sub 4}.
IAEA: N. p.,
1991.
Web.
Dobry, A, Greco, A, Migoni, R, & Stachiotti, M.
Cu charge fluctuations and anomalous behaviour in the phonon spectrum of La{sub 2}CuO{sub 4}.
IAEA.
Dobry, A, Greco, A, Migoni, R, and Stachiotti, M.
1991.
"Cu charge fluctuations and anomalous behaviour in the phonon spectrum of La{sub 2}CuO{sub 4}."
IAEA.
@misc{etde_10118600,
title = {Cu charge fluctuations and anomalous behaviour in the phonon spectrum of La{sub 2}CuO{sub 4}}
author = {Dobry, A, Greco, A, Migoni, R, and Stachiotti, M}
abstractNote = {The additional excitation observed in the phonon spectrum of La{sub 2}CuO{sub 4} is shown to arise from Cu charge fluctuations. A nonlinear breathing shell model is formulated for the coupling of these fluctuations with the lattice. The harmonic dynamics and exact nonlinear solutions are studied in a 2-D model of the CuO{sub 2} planes. A molecular dynamics simulation shows an additional peak of nonphononic character originated by the nonlinear lattice dynamics. (author). 20 refs, 3 figs.}
place = {IAEA}
year = {1991}
month = {Sep}
}
title = {Cu charge fluctuations and anomalous behaviour in the phonon spectrum of La{sub 2}CuO{sub 4}}
author = {Dobry, A, Greco, A, Migoni, R, and Stachiotti, M}
abstractNote = {The additional excitation observed in the phonon spectrum of La{sub 2}CuO{sub 4} is shown to arise from Cu charge fluctuations. A nonlinear breathing shell model is formulated for the coupling of these fluctuations with the lattice. The harmonic dynamics and exact nonlinear solutions are studied in a 2-D model of the CuO{sub 2} planes. A molecular dynamics simulation shows an additional peak of nonphononic character originated by the nonlinear lattice dynamics. (author). 20 refs, 3 figs.}
place = {IAEA}
year = {1991}
month = {Sep}
}