1999/07/27 by Takashi Hotta, Hotta, Takashi, Seiji Yunoki +3
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/9907430
15 pages, Latex, with 9 figures embedded in the text. To appear in proceedings of the conference "Science and Technology of Magnetic Oxides '99", La Jolla, July 5--7, 1999
arxiv created 1999/07/27 · arxiv updated 2009/11/30
The magnetic structure of LaMnO3 is investigated on three-dimensional clusters of MnO6 octahedra by using a combination of relaxation and Monte Carlo techniques. It is found that the cooperative Jahn-Teller phonons lead to the stabilization of A-type antiferromagnetic and C-type orbital structures in the physically relevant region of parameter space for LaMnO3 with small corrections due to tilting effects. The results suggest that strong Coulomb interactions are not necessary for a qualitative description of undoped manganites. In fact, it is shown that the present result is not essentially changed even if the Coulomb interaction is explicitly included.