Nanoscale Phase Separation in Colossal Magnetoresistance Materials: A Lesson for the Cuprates?

Abstract

A recent vast experimental and theoretical effort in manganites has shown that the colossal magnetoresistance effect can be understood based on the competition of charge-ordered and ferromagnetic phases. The general aspects of the theoretical description appear to be valid for any compound with intrinsic phase competition. In high temperature superconductors, recent experiments have shown the existence of intrinsic inhomogeneities in many materials, revealing a phenomenology quite similar to that of manganese oxides. Here, the results for manganites are briefly reviewed with emphasis on the general aspects. In addition, theoretical speculations are formulated in the context of Cu-oxides by mere analogy with manganites. This includes a tentative explanation of the spin-glass regime as a mixture of antiferromagnetic and superconducting islands, the rationalization of the pseudogap temperature T* as a Griffiths temperature where clusters start forming upon cooling, the prediction of "colossal" effects in cuprates, and the observation that quenched disorder may be far more relevant in Cu-oxides than previously anticipated.

arXiv comment25 pages, 14 figures, post-muSR2002 Superconductivity Workshop

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• Numerical Study of the Cahn-Hilliard Equation in One, Two and Three Dimensions
• Time-resolved observation of competing attractive and repulsive short-range correlations in strongly interacting Fermi gases
• Quantum mixtures of ultracold gases of neutral atoms
• Spin transport and dynamics in all-oxide perovskite La${}_{2/3}$Sr${}_{1/3}$MnO${}_3$/SrRuO${}_3$ bilayers probed by ferromagnetic resonance
• The Effects of Phase Separation in the Cuprate Superconductors
• Spin-valley half-metal as a prospective material for spin-valley-tronics
• Extrinsic inhomogeneity effects in magnetic, transport and magnetoresistive properties of La_{1-x}Ca_{x}MnO_{3} (x\approx 0.33) crystal prepared by the floating zone method
• Long Range Coulomb Interactions and Nanoscale Electronic Inhomogeneities in Correlated Oxides
• Magnetic Phase Diagram of a Five-Orbital Hubbard Model in the Real-Space Hartree Fock Approximation Varying the Electronic Density
• Phase Separation in the Vicinity of Fermi Surface Hot Spots
• Magnetic states of the five-orbital Hubbard model for one-dimensional iron-based superconductors
• Orbital-selective Mott phases of a one-dimensional three-orbital Hubbard model studied using computational techniques
• Spin-valley half-metal in systems with Fermi surface nesting
• Magnetic and Orbital Order in ($R$MnO${}_3$)${}_n$/($A$MnO${}_3$)${}_{2n}$ Superlattices Studied via a Double-Exchange Model with Strain
• Intrinsic and extrinsic inhomogeneities in mixed-valence manganites
• Magnetic interactions and magnetocaloric effect in (La0.5Pr0.5)0.6Ba0.4MnO3: Effect of A-site co-doping
• Non percolative nature of the metal-insulator transition and persistence of local Jahn-Teller distortions in the rhombohedral regime of La${}_{1-x}$Ca${}_x$MnO${}_3$
• Exploring emergent heterogeneous phases in strongly repulsive Fermi gases
• Equilibrium tuned by a magnetic field in phase separated manganite
• Electronic Phase Separation Transition as the Origin of the Superconductivity and the Pseudogap Phase of Cuprates
• Nanoscale inhomogeneity of charge density waves dynamics in La${}_{2-x}$Sr${}_x$NiO${}_4$
• Interplay between Freezing and Superconductivity in the Optimally Doped LaEu0.20Sr0.15CuO4 under Hydrostatic Pressure
• Normal state properties of high angle grain boundaries in (Y,Ca)Ba2Cu3O7-delta
• Canted Magnetic Ground State of Quarter-Doped Manganites $R_{0.75}$Ca${}_{0.25}$MnO${}_3$ ($R$ = Y, Tb, Dy, Ho, and Er)
• Electron-phonon coupling in a two-dimensional inhomogeneous electron gas: consequences for surface spectral properties
• Repulsive Fermi and Bose Polarons in Quantum Gases
• Electronic ferroelectricity and magneto-electric effect in phase separated magnetic oxidesElectronic ferroelectricity and magneto-electric effect in phase separated magnetic oxides
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• Exploring functionalized Zr${}_2$N and Sc${}_2$N MXenes as superconducting candidates with $\text{ab initio}$ calculations
• Magnetic phases of electron-doped infinite-layer Sr${}_{1-x}$La${}_x$CuO${}_2$ from first-principles density functional calculations
• Formation of magnetic moments and resistance upturn at grain boundaries of two-dimensional electron systems