Self-localization of composite spin-lattice polarons

Details Self-localization of composite spin-lattice polarons Self-localization of composite spin-lattice polarons

2005-10-20

arxiv.org/abs/cond-mat/0510540v1

Phys. Rev. Lett. 96, 086402 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.96.086402

Self-localization of holes in the Holstein t-J model is studied in the adiabatic limit using exact diagonalization and the retraceable path approximation. It is shown that the critical electron-phonon coupling \lambda_c decreases with increasing J and that this behavior is determined mainly by the incoherent rather than by the coherent motion of the hole. The obtained spin correlation functions in the localized region can be understood within a percolation picture where antiferromagnetic order can persist up to a substantial hole doping. These results restrict the possibility of self-localization of holes in lightly doped cuprates.

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