Abstract
We theoretically study the effect of spiral-type charge frustration in a quasi-one-dimensional molecular conductor . We clarify how the spiral frustration in the interchain Coulomb repulsion is relieved and leads to a self-organization of complex charge-lattice ordered chains, in agreement with the recent synchrotron x-ray study [T. Kakiuchi et al., Phys. Rev. Lett. 98, 066402 (2007)]. In addition, we find that a keen competition between charge and lattice degrees of freedom under the frustration gives rise to a characteristic temperature within the ordered phase, below which a drastic growth of molecular displacements occurs. Our results enlighten the relevance of the spiral frustration and provide a possible reconciliation among puzzling experimental data.
- Received 25 December 2008
DOI:https://doi.org/10.1103/PhysRevLett.102.196403
©2009 American Physical Society