Complex orbital state in manganites

Details Complex orbital state in manganites Complex orbital state in manganites

2000-05-27

arxiv.org/abs/cond-mat/0005482v1

Phys. Rev. B 62, 11576 (2000).

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 6 figures

Scientific paper

10.1103/PhysRevB.62.11576

The $e_g$-orbital states with complex coefficients of the linear combination of $x^2-y^2$ and $3z^2-r^2$ are studied for the ferromagnetic state in doped manganites. Especially the focus is put on the competition among uniform complex, staggered complex, and real orbital states. As the hole-doping $x$ increases, the real, the canted complex, and the staggered complex orbital states appears successively. Uniform complex state analoguous to Nagaoka ferromagnet does not appear. These complex states can be expressed as a resonating state among the planer orbitals as the orbital liquid, accompanied by no Jahn-Teller distortion.

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