Metal-insulator transition with ferromagnetic background in the two-orbital model for manganites
ORAL
Abstract
The complex spin, electron and phonon dynamics of manganese oxides continues to attract attention. In this talk, we present results of unbiased Monte Carlo simulations with fermionic exact diagonalization of the two-orbital model with Jahn-Teller phonons at filling x=1/3 on lattice sizes up to 15x15. We identify a region in the finite-temperature phase diagram with a metal-insulator transition upon increasing electron-phonon coupling. In the metal the spin background is ferromagnetic (FM) with uniform charge order, whereas the insulator shows diagonal stripes while retaining the FM background. We report resistivity and magnetization measurements alongside with spin and charge structure factors.
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Presenters
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Cengiz Sen
Physics Department, Lamar University
Authors
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Cengiz Sen
Physics Department, Lamar University
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Elbio Dagotto
Department of Physics and Astronomy, University of Tennessee and ORNL, Physics Department, University of Tennessee, University of Tennessee, Department of Physics and Astronomy, University of Tennessee at Knoxville, University of Tennessee, Knoxville, and Oak Ridge National Laboratory, University of Tennessee, Knoxville, Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee