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Author : Simon Arthur John Kimber
Release : 2008
Genre :
Kind : eBook
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Book Synopsis Spin and Orbital Ordering in Ternary Transition Metal Oxides by : Simon Arthur John Kimber
Download or read book Spin and Orbital Ordering in Ternary Transition Metal Oxides written by Simon Arthur John Kimber. This book was released on 2008. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Morgan Richard Harvey
Release : 2004
Genre :
Kind : eBook
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Book Synopsis Spin and Orbital Order in Transition Metal Oxides by : Morgan Richard Harvey
Download or read book Spin and Orbital Order in Transition Metal Oxides written by Morgan Richard Harvey. This book was released on 2004. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gang Cao
Release : 2021
Genre : Science
Kind : eBook
Book Rating : 026/5 ( reviews)
Book Synopsis Physics of Spin-Orbit-Coupled Oxides by : Gang Cao
Download or read book Physics of Spin-Orbit-Coupled Oxides written by Gang Cao. This book was released on 2021. Available in PDF, EPUB and Kindle. Book excerpt: This book is aimed at graduate students, post docs and senior researchers with preliminary expertise in materials physics or chemistry, and with an interest in the physical and chemical properties of 4d- and 5d transition metal oxides, especially ruthenates and iridates. The 4d- and 5d-transition metal oxides are among the most current and interesting quantum materials. This book reviews recent experimental and theoretical evidence that the physical and structural properties of these materials are decisively influenced by strong spin-orbit interactions that compete with comparable Coulomb, magnetic exchange and crystalline electric field interactions. This competition often leads to unusual ground states and magnetic frustration that are unique to this class of materials. Novel coupling between the orbital/lattice and spin degrees of freedom, which seriously challenge current theoretical models and are not addressed by traditional textbooks, are of particular interest, This book also reviews a few techniques for single-crystal growth that are most suitable for the 4d- and 5d-transition metal oxides. The discussion is intended to help fill an existing void in the literature describing relevant synthesis techniques for 4d- and 5d-materials, which is a daunting experimental challenge.
Author : Alexander Krimmel
Release : 2005-04-15
Genre : Science
Kind : eBook
Book Rating : 925/5 ( reviews)
Book Synopsis Electronically highly correlated ternary transition metal oxides by : Alexander Krimmel
Download or read book Electronically highly correlated ternary transition metal oxides written by Alexander Krimmel. This book was released on 2005-04-15. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: Transition metal oxides represent a large class of compounds with a uniquely wide range of electronic properties. Some of these properties, like the magnetism of loadstone, have been known since antiquity. Others, like high-temperature superconductivity have been discovered only recently and indeed would have been thought of being impossible 20 years ago. Transition metal oxides may be good insulators, semiconductors, metals or superconductors. Many of them display a metal-to-insulator transition (MIT) as a function of an external control parameter (usually temperature, pressure or chemical composition). The differences of electrical conductivity are also reflected by drastic changes of other physical properties related to the electronic structure. The electrical, magnetic and optical properties of transition metal oxides find a rich field of important technical applications. A classical example is the wide use of ferrites in electronic devices. Further examples of suitable technological applications include wide gap semiconductors, superconductors and thermoelectric materials, to mention just a few. Apart from these exciting electronic properties, some transition metal oxides exhibit a remarkable mechanical and high-temperature stability together with a strong resistance against corrosion, thus forming ideal coating materials. Several transition metal oxides may also serve as catalysts. It was the discovery of high-temperature superconductivity in the cuprates and, subsequently, of the colossal magneto-resistance effect (CMR) in the manganates that triggered a tremendous research effort in transition metal oxides during the last decade. [...]
Author :
Release : 2004
Genre :
Kind : eBook
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Book Synopsis Spin-orbital Physics in Transition Metal Oxides by :
Download or read book Spin-orbital Physics in Transition Metal Oxides written by . This book was released on 2004. Available in PDF, EPUB and Kindle. Book excerpt: Many body aspect of interplay between spin degrees of freedom and orbital degrees of freedom in transition metal oxides is studied. In this thesis work, I study three major research projects. First, I study SU(2) Heisenberg spin models and discuss some pathologies associated with the Schwinger boson mean field theory for the SU(N) Heisenberg models in which orbital degrees of freedom can be included as an internal symmetry. Second, considering the key parameters realized in the system, I derive an effective superexchange spin-orbital Hamiltonian for the $YVO3̲$ system and use mean field theory to explain the observed high temperature orbital transition and spin transitions. Third, I study the newly proposed spin-2 bond model for insulating $V2̲O3̲$ system. I use Bogolyubov-Peirels variational approach to study the effects of quantum fluctuation and short range spin correlations on magnetic phase transitions. Then, I explin observed large entropy jump and the other experimental observations in the system. Interestingly, with the model of $V2̲O3̲$, I find a novel mechanism for spin ordering and disordering transitions due dimensional crossover and dimensional reduction induced by orbital ordering.
