Electron localization in one dimension obtained from combined exact diagonalization - ab initio approach

Details Electron localization in one dimension obtained from combined exact diagonalization - ab initio approach Electron localization in one dimension obtained from combined exact diagonalization - ab initio approach

2001-06-05

arxiv.org/abs/cond-mat/0106089v1

Phys. Rev. B 64, 161105 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages; submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevB.64.161105

Exact ground-state properties are presented by combining the diagonalization in the Fock space (and taking all hopping integrals and all two-site interactions) with the ab initio optimization of the Wannier functions. Electrons are essentially localized for the interatomic distance R~2A for s-like states, when the quasiparticle mass is divergent. The momentum distribution dispersion is proposed to define the localization order parameter. Dimerization and zero-point energies are also discussed. The method provides convergent results for N>=8 atoms.

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