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Author : Maxim Yu. Kagan
Publisher : Springer Nature
Page : 385 pages
File Size : 54,7 Mb
Release : 2024-07-02
Category : Electronic
ISBN : 9783031554674
Author : Maxim Yu. Kagan,Kliment I. Kugel,Alexander L. Rakhmanov,Artem O. Sboychakov
Publisher : Springer
Page : 0 pages
File Size : 55,9 Mb
Release : 2024-05-16
Category : Science
ISBN : 3031554663
This book focuses on nanoscale electronic phase separation in a wide class of different materials, especially in strongly correlated electron systems. It features an extensive review of the field of inhomogeneous spin and charge states in condensed matter physics while delivering a topical and timely discussion of a wide range of recent advances in electronic phase separation. It describes the formation of different types of nanoscale ferromagnetic metallic droplets in antiferromagnetically ordered, charge-ordered, or orbitally-ordered insulating matrices, as well as the colossal magnetoresistance effect and tunneling electron transport in the nonmetallic phase-separated state of complex magnetic oxides. It also discusses compounds with spin-state transitions, inhomogeneously phase-separated states in strongly correlated multiband systems, and the electron polaron effect, paying special attention to systems with imperfect Fermi surface-nesting such as chromium alloys, iron-based pnictides, and AA-stacked graphene bilayers. The authors investigate also the formation of order parameter clusters and insulator-superconductor transition in different superconducting systems including bismuth oxides, two-dimensional films in the presence of strong disorder, as well as inhomogeneous Fermi-Bose mixtures in Aharonov-Bohm rings with a superconducting bridge in a topologically nontrivial state. This book is a valuable resource for researchers involved in theoretical and experimental studies of strongly correlated materials, such as magnetic semiconductors, Fermi-Bose mixtures, and twisted bilayer graphene.
Author : Antonio Bianconi,Naurang L. Saini
Publisher : Springer Science & Business Media
Page : 557 pages
File Size : 42,7 Mb
Release : 2006-04-10
Category : Technology & Engineering
ISBN : 9780306471001
The problem of superconductors has been a central issue in Solid State Physics since 1987. After the discovery of superconductivity (HTSC) in doped perovskites, it was realized that the HTSC appears in an unknown complex electronic phase of c- densed matter. In the early years, all theories of HTSC were focused on the physics of a homogeneous 2D metal with large electron–electron correlations or on a 2D polaron gas. Only after 1990, a novel paradigm started to grow where this 2D metallic phase is described as an inhomogeneous metal. This was the outcome of several experimental evidences of phase separation at low doping. Since 1992, a series of conferences on phase separation were organized to allow scientists to get together to discuss the phase separation and related issues. Following the discovery by the Rome group in 1992 that “the charges move freely mainly in one direction like the water running in the grooves in the corrugated iron foil,” a new scenario to understand superconductivity in the superconductors was open. Because the charges move like rivers, the physics of these materials shifts toward the physics of novel mesoscopic heterostructures and complex electronic solids. Therefore, understanding the striped phases in the perovskites not only provides an opportunity to understand the anomalous metallic state of cuprate superconductors, but also suggests a way to design new materials of technological importance. Indeed, the stripes are becoming a field of general scientific interest.
Author : Ernst Sigmund,K.Alex Müller
Publisher : Springer Science & Business Media
Page : 417 pages
File Size : 40,9 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9783642788055
Phase separation has become a fascinating subject in the discussion of cuprate superconductors. All these materials have layered structures containing CU02 planes as the most important building blocks. They are coupled only weakly so that the electronic properties show a nearly two-dimensional behaviour. Due to correlations the undoped compounds are insulators of the Mott Hubbard type exhibiting long-range antiferromagnetic order. Upon doping a rich scenario of physical phenomena appears: Even at low hole concentra tions the antiferromagnetic ordering temperature is reduced drastically and spin-glass behaviour as well as a hopping type conductivity can be observed. Further doping leads to metallic-like conductivity and below Tc to super conductivity. In this doping regime antiferromagnetic fluctuations are still observed. At very high charge carrier densities superconductivity is lost and the systems show pure metallic conduction without ,magnetic correlations. One of the most interesting phenomena in high-T c research is the interplay between magnetism and conductivity or superconductivity. Especially the behaviour of charge carriers in the antiferromagnetic background raises a number of open questions. Two scenarios become possible: the carriers tend to delocalize over the whole crystal forming a homogeneous state with band-like structure or they separate into hole-rich (conducting, superconducting) and hole-poor (insulating, antiferromagnetic) phases leading to an inhomogeneous structure.
Author : Eduard L Nagaev
Publisher : World Scientific
Page : 476 pages
File Size : 46,6 Mb
Release : 2002-06-04
Category : Science
ISBN : 9781783261338
Colossal magnetoresistance materials, to which manganites and conventional ferromagnetic semiconductors belong, draw great attention because of their intriguing physical properties and the excellent prospects for their practical applications in electronic devices. In addition, magnetic semiconductors are basic materials for high-temperature conductors, and it is impossible to construct a theory of the latter without elucidating properties of the former. This book presents theoretical and experimental results on manganites and conventional magnetic semiconductors, with emphasis on the former. It is addressed mainly to researchers dealing with manganites or high-temperature superconductors, but is also useful for undergraduate and graduate students. Contents:Introduction and Necessary Information about Non-magnetic Semiconductors and Insulating Magnetic SystemsPrinciples of Theory of Conducting MagneticNon-degenerate Ferromagnetic SemiconductorsNon-degenerate Antiferromagnetic Semiconductors and Self-trapped StatesDegenerate Ferromagnetic SemiconductorsDegenerate Antiferromagnetic Semiconductors and Phase SeparationLanthanum ManganitesOther ManganitesSpecific Effects and Theory of Manganites Readership: Advanced graduate students, lecturers and researchers in condensed matter physics, superconductivity and magnetic materials. Keywords:Magnetic Semiconductors;Magnetic Polaron (Ferron);Electronic Phase Separation;Manganites;Colossal Magnetoresistance;Solid State Physics
Author : K Alex Müller,Giorgio Benedek
Publisher : World Scientific
Page : 392 pages
File Size : 45,6 Mb
Release : 1993-01-08
Category : High temperature superconductivity
ISBN : 9789814553513
The main objective of this workshop was to review and discuss the electronic and chemical properties of layered cuprate superconductors. These are doped antiferromagnetic (AFM) insulators, and there is the possibility of a dynamic phase separation into metallic clusters and AFM areas. A clarification on the existence and the mechanism of such a phase separation is believed to be crucial for the understanding of high-Tc superconductivity in cuprates. On the one hand, theoretical and recent experimental indications in favor of this possibility were presented, on the other hand experimental papers expressing more skeptical views were also delivered. Related work on phase separations of chemical and structural origin was also included, followed by contributions on the question; “If phase separation is present, what is the pairing mechanism in the metallic clusters?”. Readership: Condensed matter physicists, materials scientists and chemists.keywords:
Author : Anant V. Narlikar
Publisher : Springer Science & Business Media
Page : 1122 pages
File Size : 51,7 Mb
Release : 2005-12-06
Category : Technology & Engineering
ISBN : 9783540272946
Frontiers in Superconducting Materials gives a state-of-the-art report of the most important topics of the current research in superconductive materials and related phenomena. It comprises 30 chapters written by renowned international experts in the field. It is of central interest to researchers and specialists in Physics and Materials Science, both in academic and industrial research, as well as advanced students. It also addresses electronic and electrical engineers. Even non-specialists interested in superconductivity might find some useful answers.
Author : Bruno Lüthi
Publisher : Springer Science & Business Media
Page : 425 pages
File Size : 42,5 Mb
Release : 2006-01-15
Category : Science
ISBN : 9783540272793
Physical Acoustics in the Solid State reviews the modern aspects in the field, including many experimental results, especially those involving ultrasonics. It covers practically all fields of solid-state physics. After a review of the relevant experimental techniques and an introduction to the theory of elasticity, the book details applications in the various fields of condensed matter physics.
Author : Aliaksei Charnukha
Publisher : Springer Science & Business Media
Page : 139 pages
File Size : 53,6 Mb
Release : 2013-09-12
Category : Technology & Engineering
ISBN : 9783319011929
This thesis combines highly accurate optical spectroscopy data on the recently discovered iron-based high-temperature superconductors with an incisive theoretical analysis. Three outstanding results are reported: (1) The superconductivity-induced modification of the far-infrared conductivity of an iron arsenide with minimal chemical disorder is quantitatively described by means of a strong-coupling theory for spin fluctuation mediated Cooper pairing. The formalism developed in this thesis also describes prior spectroscopic data on more disordered compounds. (2) The same materials exhibit a sharp superconductivity-induced anomaly for photon energies around 2.5 eV, two orders of magnitude larger than the superconducting energy gap. The author provides a qualitative interpretation of this unprecedented observation, which is based on the multiband nature of the superconducting state. (3) The thesis also develops a comprehensive description of a superconducting, yet optically transparent iron chalcogenide compound. The author shows that this highly unusual behavior can be explained as a result of the nanoscopic coexistence of insulating and superconducting phases, and he uses a combination of two complementary experimental methods - scanning near-field optical microscopy and low-energy muon spin rotation - to directly image the phase coexistence and quantitatively determine the phase composition. These data have important implications for the interpretation of data from other experimental probes.
Author : Jiabao Yi,Sean Li
Publisher : CRC Press
Page : 361 pages
File Size : 50,9 Mb
Release : 2018-05-11
Category : Science
ISBN : 9781351682756
This informative book focuses on newly developed functional materials and their applications for electronic and spintronic devices. Electronic devices have become a part of our daily modern life, involving mobile phones, data storage, computers, and satellites, and there is relentless growth in microelectronics. This volume covers the topics of oxide materials for electronics devices, new materials, and new properties, especially in newly developed research areas, such as oxide magnetic semiconductors and two-dimensional electron gas. Key features: Emphasizes functional materials for electronic devices, including two-dimensional materials, two-dimensional electron gas, multiferroic materials, memory materials, sensor materials, and spintronic materials. Describes the basics as well as new developments of these functional materials and devices.
Author : Anonim
Publisher : Unknown
Page : 702 pages
File Size : 43,8 Mb
Release : 1995
Category : Aeronautics
ISBN : UIUC:30112048646605
Author : Anonim
Publisher : Unknown
Page : 528 pages
File Size : 50,5 Mb
Release : 1995
Category : Physics
ISBN : CHI:45776510
Author : A. V. Narlikar
Publisher : Nova Science Pub Incorporated
Page : 200 pages
File Size : 46,9 Mb
Release : 2003
Category : Science
ISBN : 1590337972
This volume focuses on the topical area of magnetic superconductors. Rutheno cuprates and quaternary borocarbides are the two frontal materials forming the mainstay of the book. The authors are noted for their pioneering contribution in the field. In all, there are 6 chapters written by 18 researchers from 6 countries taking stock of frontal issues of both experiment and theory. Chapter headings: Phase Separation, Magnetism and Superconductivity in Rutheno-Cuprates; Coexistence of Superconductivity and Magnetism in R2-xCexRuSr2Cu2O10-d(R=Eu and Gd); Magneto-Superconductivity in Rutheno-Cuprates RuSr2GdCu28-d (Ru-1212) AND RuSr2(Gd0.75 Ce0.25)2Cu2O10-d (Ru-1222): A Critical Review; Therman Conductivity in Magnetic Superconductors; Magnon Specific Heat of the Antiferromagnetic Superconductors RNi2B2C [R=Tm, Er, Ho, Dy]; On the Role of the Electronic Structure in the Properties of Pseudo Quaternary Borocarbides.
Author : Annette Bussmann-Holder,Hugo Keller,Antonio Bianconi
Publisher : Springer
Page : 322 pages
File Size : 50,5 Mb
Release : 2017-03-24
Category : Technology & Engineering
ISBN : 9783319526751
Authored by many of the world's leading experts on high-Tc superconductivity, this volume presents a panorama of ongoing research in the field, as well as insights into related multifunctional materials. The contributions cover many different and complementary aspects of the physics and materials challenges, with an emphasis on superconducting materials that have emerged since the discovery of the cuprate superconductors, for example pnictides, MgB2, H2S and other hydrides. Special attention is also paid to interface superconductivity. In addition to superconductors, the volume also addresses materials related to polar and multifunctional ground states, another class of materials that owes its discovery to Prof. Müller's ground-breaking research on SrTiO3.
Author : Elbio Dagotto
Publisher : Springer Science & Business Media
Page : 465 pages
File Size : 54,5 Mb
Release : 2013-03-14
Category : Science
ISBN : 9783662052440
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.