Nanoscale Phase Separation And Colossal Magnetoresistance: The Physics Of Manganites And Related Compounds (springer Series In Solid-state Sciences)

The study of the spontaneous formation of nanostructures in single crystals of several compounds is now a major area of research in strongly correlated electrons. These structures appear to originate in the competition of phases. This book addresses nanoscale phase separation, focusing on the manganese oxides known as manganites that show the colossal magnetoresistance (CMR) effect which has potential relevance for device applications. It is argued that the nanostructures are at the heart of the CMR phenomenon. The book contains updated information on manganite research directed to experts, both theorists and experimentalists. However, graduate students or postdocs will find considerable introductory material, including elements of computational physics. The book also briefly addresses compounds where similar nanostructures have been unveiled, such as high-temperature superconductors and Eu-based semiconductors. Includes contributions by distinguished researchers. 1. Why Manganites Are Interesting 2. The Discovery of Manganites and the Colossal Magnetoresistance Effect 3. Phase Diagrams and Basic Properties of Manganites 4. Preliminary Theoretical Considerations 5. Models for Manganites 6. The One-Orbital Model: Phase Diagram and Dominant Correlations 7. Monte Carlo Simulations and Applications to Manganite Models 8. Mean-Field Approximations 9. Two Orbitals Model and Orbital Order 10. Charge Ordering 11. Inhomogeneities in Manganites 12. Optical Conductivity 13. Glassy Behavior and Time Dependent Phenomena 14.-Inhomogeneities in La1-xSRxMnOx 15 Inhomogeneities in Layered Manganites 16. An Elementary Introduction to Percolation 17. Competition of Phases as the Origin of the CMR 18. Pseudogaps and Photoemission Experiments 19. Charge Ordered Nanoclusters above TC 20. Other Compounds with Large MR and/or Competing FM-AF Phases 21. Brief Introduction to Giant Magnetoresistance 22. Discussion and Open Questions. The study of the spontaneous formation of nanostructures in single crystals is rapidly developing into a dominant field of research in the subject area known as strongly correlated electrons. The structures appear to originate in the competition of phases. This book addresses nanoscale phase separation, focusing on the manganese oxides with colossal magnetoresistance (CMR). The text argues that nanostructures are at the heart of the CMR phenomenon. Other compounds are also addressed, such as high-temperature superconductors, where similar nanostructures exist. Brief contributions by distinguished researchers are also included. The book contains updated information directed at experts, both theorists and experimentalists. Beginning graduate students or postdocs will also benefit from the introductory material of the early chapters, and the book can be used as a reference for an advanced graduate course.

The study of the spontaneous formation of nanostructures in single crystals of several compounds is now a major area of research in strongly correlated electrons. These structures appear to originate in the competition of phases. The book addresses nanoscale phase separation, focusing on the manganese oxides known as manganites that have the colossal magnetoresistance (CMR) effect of potential relevance for device applications. It is argued that the nanostructures are at the heart of the CMR phenomenon. The book contains updated information on manganite research directed to experts, both theorists and experimentalists. However, graduate students or postdocs will find considerable introductory material, including elements of computational physics.