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Charge kinks as Raman scatterers in quarter-filled ladders

E. Ya. Sherman·C. Ambrosch-Draxl·P. Lemmens·G. Guentherodt·P. H. M. van Loosdrecht
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Abstract

Charge kinks are considered as fundamental excitations in quarter-filled charge-ordered ladders. The strength of the coupling of the kinks to the three-dimensional lattice depends on their energy. The integrated intensity of Raman scattering by kink-antikink pairs is proportional to $ϕ^{5}$ or $ϕ^{4},$ where $ϕ$ is the order parameter. The exponent is determined by the system parameters and by the strength of the electron-phonon coupling.

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E. Ya. Sherman, C. Ambrosch-Draxl, P. Lemmens, G. Guentherodt, P. H. M. van Loosdrecht. 2001-05-14. Charge kinks as Raman scatterers in quarter-filled ladders. https://doi.org/10.1103/physrevb.63.224305

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