On the Fermi Liquid to Polaron Crossover II: Double Exchange and the Physics of "Colossal" Magnetoresistance

Abstract

We use the dynamical mean field method to study a model of electrons Jahn-Teller coupled to localized classical oscillators and ferromagnetically coupled to ``core spins'', which, we argue, contains the essential physics of the ``colossal magnetoresistance'' manganites $R{e}_{1-x}{A}_{x}Mn{O}_3$. We determine the different regimes of the model and present results for the temperature and frequency dependence of the conductivity, the electron spectral function and the root mean square lattice parameter fluctuations. We compare our results to data, and give a qualitative discussion of important physics not included in the calculation. Extensive use is made of results from a companion paper titled: ``On the Fermi Liquid to Polaron Crossover I: General Results''.

34 pages, 10 figures. Depends on previous paper titled "On the Fermi Liquid to Poalron Crossover I: General Results

References in corpus (5)

• Double Exchange Alone Does Not Explain the Resistivity of $L{a}_{1-x}S{r}_{x}Mn{O}_3$
• Cooperative Jahn-Teller Effect and Electron-Phonon Coupling in $L{a}_{1-x}{A}_{x}Mn{O}_3$
• Transport Properties of the Kondo Lattice Model in the Limit $S=\infty$ and $D=\infty$
• On the Fermi Liquid to Polaron Crossover I: General Results
• Double Degeneracy and Jahn-Teller Effects in CMR Perovskites

Cited by in corpus (135)

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• On the Fermi Liquid to Polaron Crossover I: General Results
• Electronic origin of magnetic and orbital ordering in insulating LaMnO_3
• Griffiths singularities and magnetoresistive manganites
• Phase Separation Induced by Orbital Degrees of Freedom in Models for Manganites with Jahn-Teller Phonons
• Fermi Surface Nesting and Nanoscale Fluctuating Charge/Orbital Ordering in Colossal Magnetoresistive Oxides
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• Polaron Absorption in a Perovskite Manganite La0.7Ca0.3MnO3
• Ferromagnetism and electron-phonon coupling in the manganites
• Non-Fermi Liquid Behavior and Double-Exchange Physics in Orbital-Selective Mott Systems
• Theory of Insulator Metal Transition and Colossal Magnetoresistance in Doped Manganites
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• Determinant quantum Monte Carlo study of the two-dimensional single-band Hubbard-Holstein model
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• Polaronic excitations in CMR manganite films
• Holstein model in infinite dimensions at half-filling
• Precise Measurement of Optical Reflectivity Spectra Using Defect-Free Surface of La(1-x)Sr(x)MnO(3): Evidence Against Extremely Small Drude Weight
• Optical spectral weights and the ferromagnetic transition temperature of CMR manganites: relevance of double-exchange to real materials
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• Infrared Studies of a La_{0.67}Ca_{0.33}MnO_3 Single Crystal: Optical Magnetoconductivity in a Half-Metallic Ferromagnet
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• Orbital dynamics: The origin of the anomalous optical spectra in ferromagnetic manganites
• T=0 Phase Diagram of the Double-Exchange Model
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• Polaron Crossover and Bipolaronic Metal-Insulator Transition in the Holstein model at half-filling
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• Displaced Drude peak and bad metal from the interaction with slow fluctuations
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• Fictive Impurity Approach to Dynamical Mean Field Theory: a Strong-Coupling Investigation
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• Effect of Jahn-Teller coupling on Curie temperature in the Double Exchange Model
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• Persistent Current in the Ferromagnetic Kondo Lattice Model
• Magnetic Instabilities and Phase Diagram of the Double-Exchange Model in Infinite Dimensions
• Charge ordering in half-doped Pr(Nd)${}_{0.5}$Ca${}_{0.5}$MnO${}_3$ under magnetic field
• Implications of the Low-Temperature Instability of Dynamical Mean Theory for Double Exchange Systems
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