Co-existence of charge order and spin Peierls lattice distortion in one-dimensional organic compounds

2002 ◽  
Vol 12 (9) ◽  
pp. 205-209
Author(s):  
H. Seo ◽  
M. Kuwabara ◽  
M. Ogata
Keyword(s):  
Ground State ◽  
Lattice Distortion ◽  
Charge Order ◽  
Combined Effects ◽  
Strongly Correlated ◽  
Coulomb Interactions ◽  
Phonon Interaction ◽  
One Dimensional ◽  
Electron Phonon Interaction ◽  
Ordered State

The ground state properties of the organic spin-Peierls compounds with one-dimensional quarter-filled band are investigated theoretically. In the strongly correlated regime, two insulating states compete to each other, which are the charge ordered state due to the inter-site Coulomb interaction, and the `dimer Mott' insulating state due to the combined effects of the electron-phonon and the on-site Coulomb interactions. In both of these states, the electron-phonon interaction further produces the lattice tetramization, which is interpreted as the spin-Peierls state.

scholarly journals Dynamic electron correlations with charge order wavelength along all directions in the copper oxide plane

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
F. Boschini ◽  
M. Minola ◽  
R. Sutarto ◽  
E. Schierle ◽  
M. Bluschke ◽  
...  
Keyword(s):  
Charge Order ◽  
Strongly Correlated ◽  
Coulomb Interactions ◽  
Static Charge ◽  
Temperature Dependent ◽  
X Ray ◽  
Circular Pattern ◽  
X Ray Scattering ◽  
Plane Direction ◽  
Vector Magnitude

AbstractIn strongly correlated systems the strength of Coulomb interactions between electrons, relative to their kinetic energy, plays a central role in determining their emergent quantum mechanical phases. We perform resonant x-ray scattering on Bi2Sr2CaCu2O8+δ, a prototypical cuprate superconductor, to probe electronic correlations within the CuO2 plane. We discover a dynamic quasi-circular pattern in the x-y scattering plane with a radius that matches the wave vector magnitude of the well-known static charge order. Along with doping- and temperature-dependent measurements, our experiments reveal a picture of charge order competing with superconductivity where short-range domains along x and y can dynamically rotate into any other in-plane direction. This quasi-circular spectrum, a hallmark of Brazovskii-type fluctuations, has immediate consequences to our understanding of rotational and translational symmetry breaking in the cuprates. We discuss how the combination of short- and long-range Coulomb interactions results in an effective non-monotonic potential that may determine the quasi-circular pattern.

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