Competing Ferromagnetic and Charge-Ordered States in Models for Manganites: the Origin of the CMR Effect

Abstract

The one-orbital model for manganites with cooperative phonons and superexchange coupling $J_{\mathrm{AF}}$ has been investigated via large-scale Monte Carlo (MC) simulations. Results for two-orbitals are also briefly discussed. Focusing on electronic density $n$=0.75, a regime of competition between ferromagnetic (FM) metallic and charge-ordered (CO) insulating states was identified. In the vicinity of the associated bicritical point, colossal magnetoresistance (CMR) effects were observed. The CMR is associated with the development of short-distance correlations among polarons, above the spin ordering temperatures, resembling the charge arrangement of the low-temperature CO state.

4 pages, 4 figures, accepted for publication in the Phys. Rev. Lett

References in corpus (20)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Complexity in Strongly Correlated Electronic Systems
• Colossal Effects in Transition Metal Oxides Caused by Intrinsic Inhomogeneities
• Charge Ordering and Polaron Formation in the Magnetoresistive Oxide La0.7Ca0.3MnO3
• Relevance of Cooperative Lattice Effects and Correlated Disorder in Phase-Separation Theories for CMR Manganites
• Charge-orbital ordering and phase-separation in the two-orbital model for manganites: Roles of Jahn-Teller phononic and Coulombic interactions
• Colossal magnetoresistance without phase separation: Disorder-induced spin glass state and nanometer scale orbital-charge correlation in half doped manganites
• Competing Orders and Disorder-induced Insulator to Metal Transition in Manganites
• Theoretical Study of Half-Doped Models for Manganites: Fragility of the CE Phase with Disorder, Two Types of Colossal Magnetoresistances, and Charge-Ordered States for Electron-Doped Materials
• Polarons and confinement of electronic motion to two dimensions in a layered transition metal oxide
• Static and Dynamical Properties of the Ferromagnetic Kondo Model with Direct Antiferromagnetic Coupling Between the localized $t_{2g}$ Electrons
• Glass Transition in the Polaron Dynamics of CMR Manganites
• Pseudogap Formation in Models for Manganites
• Computational implementation of the Kubo formula for the static conductance: application to two-dimensional quantum dots
• Insulator-Metal Phase Diagram of the Optimally Doped Manganites from the Disordered Holstein-Double Exchange Model
• Variational Mean Field approach to the Double Exchange Model
• Colossal Magnetoresistance Observed in Monte Carlo Simulations of the One- and Two-Orbital Models for Manganites
• Singular Effect of Disorder on Electronic Transport in Strong Coupling Electron-Phonon Systems
• Discontinuous transitions in double exchange materials
• Structural Disorder Induced Polaron Formation and Magnetic Scattering in the Disordered Holstein-Double Exchange Model

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