Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-11-17
Physics
Condensed Matter
Strongly Correlated Electrons
8 pages, 5 figures; The revised version contains a discussion of the antiferromagnetic A to Ferromagnetic phase boundary, and
Scientific paper
10.1103/PhysRevB.60.10747
Distortions of the oxygen sublattice couple to $e_g$ orbitals of Mn$^{3+}$ and drive a cooperative Jahn-Teller (orbital ordering) transition in LaMnO$_3$. A simple model for this transition is studied. Without further adjustment, the model predicts the shape and stability of small (anti-Jahn-Teller) polarons which form when holes are doped into the material. This leads to a new description of the lightly doped insulator, the anti-ferromagnetic to ferromagnetic transition, and the metal-insulator transition.
Allen Philip B.
Perebeinos Vasili
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