scholarly journals Resonant Raman scattering effects in a nesting-driven charge-density-wave insulator: Exact analysis of the spinless Falicov-Kimball model with dynamical mean-field theory

2010 ◽  
Vol 82 (15) ◽  
Author(s):  
O. P. Matveev ◽  
A. M. Shvaika ◽  
J. K. Freericks
Keyword(s):  
Field Theory ◽  
Raman Scattering ◽  
Charge Density Wave ◽  
Mean Field Theory ◽  
Density Wave ◽  
Mean Field ◽  
Dynamical Mean Field Theory ◽  
Scattering Effects ◽  
Resonant Raman ◽  
Resonant Raman Scattering

Resonant Raman scattering from a charge-density-wave system (TTF-TCNQ)

1998 ◽  
Vol 105 (7) ◽  
pp. 427-431 ◽  
Author(s):  
J.E. Eldridge ◽  
Y. Lin ◽  
T.C. Mayadunne ◽  
L.K. Montgomery ◽  
S. Kaganov ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave System ◽  
Resonant Raman ◽  
Resonant Raman Scattering ◽  
A Charge

Ferromagnetism, Dimerization, Charge and Spin Density Waves in Quasi-One-Dimensional Organic Polymers: Self-Consistent Mean Field Theory

1998 ◽  
Vol 12 (20) ◽  
pp. 2031-2044 ◽  
Author(s):  
Shi-Dong Liang ◽  
Qianghua Wang ◽  
Z. D. Wang ◽  
Shun-Qing Shen
Keyword(s):  
Field Theory ◽  
Charge Density ◽  
Spin Density ◽  
Charge Density Wave ◽  
Mean Field Theory ◽  
Density Wave ◽  
Mean Field ◽  
One Dimensional ◽  
Ferromagnetic Order ◽  
Self Consistent

We address the low temperature properties of quasi-one-dimensional organic polymers, which may be described by a modified Anderson lattice-Su–Schrieffer–Heeger Hamiltonian. The condition and nature of various orders, such as, the ferromagnetic order, the dimerization order, the charge density wave order and the spin density wave order, are analyzed by a self-consistent mean field theory. Analytical results are obtained for a specific case. The topological structure of the chain leads to a flatband structure of the energy band, which gives rise to a ferromagnetic order in the case of half filling at low temperatures. The on-site Coulomb repulsion enhances the ferromagnetic order, while the nearest-neighbor interaction (V) suppresses both the ferromagnetic order and the dimerization, and leads to the charge density wave. The π–d hybridization (td) suppresses the dimerization, and does not affect the magnetization. The ferromagnetic order and dimerization order coexist for weak td.

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