Spiral charge frustration in molecular conductor (DI-DCNQI)2Ag

Details Spiral charge frustration in molecular conductor (DI-DCNQI)2Ag Spiral charge frustration in molecular conductor (DI-DCNQI)2Ag

2008-12-25

arxiv.org/abs/0812.4593v2

Phys. Rev. Lett. 102, 196403 (2009) [4 pages]

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures; replaced with the published version

Scientific paper

10.1103/PhysRevLett.102.196403

We theoretically study the effect of spiral-type charge frustration in a quasi-one-dimensional molecular conductor (DI-DCNQI)2Ag. 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.

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