Local mode behaviour in quasi-1D CDW systems
arXiv:cond-mat/9910093 · doi:10.1016/S0921-4526(99)01066-2
Abstract
We analyze numerically the ground-state and spectral properties of the three-quarter filled Peierls-Hubbard Hamiltonian. Various charge- and spin-ordered states are identified. In the strong-coupling regime, we find clear signatures of local lattice distortions accompanied by intrinsic multi-phonon localization. The results are discussed in relation to recent experiments on MX chain [-PtCl-] complexes. In particular we are able to reproduce the observed red shift of the overtone resonance Raman spectrum.
2 pages, 2 figures, Proceedings Yamada Conference on Strongly Correlated Electron Systems, Nagana, Japan 1999