Phase competitions and coexistences in quasi-one-dimensional molecular conductors: exact diagonalization study - Condensed Matter > Strongly Correlated ElectronsReportar como inadecuado




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Abstract: We investigate ground state properties of a quasi-one-dimensionalelectron-lattice coupled model for quarter-filled molecular conductors. Theeffective one-dimensional extended Hubbard model coupled to adiabatic latticedegree of freedom is derived by the inter-chain mean-field approximation andsolved by Lanczos exact diagonalization method. We find that the criticalbehavior among lattice tetramerized states with different charge-latticeordered patterns is sensitively affected by the inter-chain Coulombinteraction, lattice anharmonicity, and intrinsic dimerization. This indicatesa subtle balance between these states originating from strong correlation andreduced dimensionality.



Autor: Yuichi Otsuka, Hitoshi Seo, Yukitoshi Motome, Takeo Kato

Fuente: https://arxiv.org/







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