High Temperature Superconductivity in Cuprates

The main purpose of the book is to present a description of the mechanism of high-temperature superconductivity and to discuss the physics of high-temperature superconductors, both entirely based on experimental facts.

Author: A. Mourachkine

Publisher: Springer Science & Business Media

ISBN: 9781402008108

Category: Science

Page: 317

View: 237

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The main purpose of the book is to present a description of the mechanism of high-temperature superconductivity and to discuss the physics of high-temperature superconductors, both entirely based on experimental facts. The pairing mechanism of this remarkable phenomenon is based on an anomaly found in tunneling (V) characteristics of some cuprates. By using the soliton theory, it is then shown that this anomaly is caused by pairs of quasi-one dimensional excitations - bisolitons - bound due to a moderately strong, nonlinear electron-phonon interaction. At the same time, analysis of experimental data unambiguously shows that magnetic (spin) fluctuations mediate the phase coherence in cuprates. The mechanism of superconductivity in quasi-one dimensional organic superconductors and heavy fermions is discussed too. In cuprates, the origins of five different energy/temperature scales are identified. Finally, three main principles of superconductivity are introduced at the end of the book. Analysis of tunneling and angle-resolved photoemission measurements is presented in the last chapter. The book which contains 300 pages with 180 illustrations is addressed to researchers and graduate students in all branches of exact sciences.
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High Temperature Superconductors Materials Properties and Applications

The possibility of using liquid nitrogen as coolant re-stimulated interest in power applications of supercon ductivity. In this book an overview of the known high-Te superconductors and their physical properties is presented.

Author: Rainer Wesche

Publisher: Springer Science & Business Media

ISBN: 9781461550754

Category: Technology & Engineering

Page: 437

View: 524

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The discovery by J. G. Bednorz and K. A. Mtllier in 1986 that the superconducting state can exist in oxides at temperatures above 30 K stimulated research in the field of superconductivity and opened up a new field of research. Within a few years a large number of cuprate superconductors with transition temperatures well above the boiling point of liquid nitrogen have been found. The possibility of using liquid nitrogen as coolant re-stimulated interest in power applications of supercon ductivity. In this book an overview of the known high-Te superconductors and their physical properties is presented. Aspects related to conductor fabrication and high-current applications are emphasised. The material should be suitable for use in graduate level courses on superconductivity. Researchers in the field may profit from the large number of tables and references describing its status at the end of 1997. An introduction to high-To superconductivity must be based on the fundamental physical principles of normal-state electrical conductivity and the well-known characteristics of conventional superconductors. In Chapter 2 this background is provided. Crystal structures, anisotropic properties and general trends of the critical temperatures of the cuprate superconductors are described in Chapters 3 and 4. The processing of superconductor powders addressed in Chapter 5 affects considerably the current-carrying capacity of high-T. wires. In Chapter 6 several fabrication techniques for superconducting wires are described. In addition, the factors limiting the transport critical currents ofhigh-Te wires are discussed.
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Handbook of High Temperature Superconductivity

14 t−J Model and the Gauge Theory Description of Underdoped Cuprates
Patrick A. Lee We review the effort to understand the physics of high temperature
superconductors from the point of view of doping a Mott insulator. We begin with
a ...

Author: J. Robert Schrieffer

Publisher: Springer Science & Business Media

ISBN: 9780387687346

Category: Technology & Engineering

Page: 627

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Since the 1980s, a general theme in the study of high-temperature superconductors has been to test the BCS theory and its predictions against new data. At the same time, this process has engendered new physics, new materials, and new theoretical frameworks. Remarkable advances have occurred in sample quality and in single crystals, in hole and electron doping in the development of sister compounds with lower transition temperatures, and in instruments to probe structure and dynamics. Handbook of High-Temperature Superconductvity is a comprehensive and in-depth treatment of both experimental and theoretical methodologies by the the world's top leaders in the field. The Editor, Nobel Laureate J. Robert Schrieffer, and Associate Editor James S. Brooks, have produced a unified, coherent work providing a global view of high-temperature superconductivity covering the materials, the relationships with heavy-fermion and organic systems, and the many formidable challenges that remain.
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Physical Properties of High Temperature Superconductors III

This volume brings the reader up to date on transport phenomena, including electrical and thermal conductivity and infrared properties.

Author: Donald M. Ginsberg

Publisher: World Scientific

ISBN: 9810208758

Category: Technology & Engineering

Page: 630

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This volume brings the reader up to date on transport phenomena, including electrical and thermal conductivity and infrared properties. In addition, electron tunneling and the characteristics and applications of films are discussed; the preparation of the necessary samples has proceeded, and a sizeable body of reproducible data has become available. Pressure effects are also presented; considerable progress has been made in relating them to the crystallographic and electronic structure of high temperature superconductors. The preparation and characterization of bulk samples is also reviewed.
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Handbook of High Temperature Superconductor

The discovery of other layered copper oxide materials with superconducting
transition temperatures, T c , exceeding the boiling point of liquid nitrogen (77K)
soon followed. Today, numerous high-temperature superconducting (HTS)
cuprate ...

Author: Neeraj Khare

Publisher: CRC Press

ISBN: 9780824755300

Category: Technology & Engineering

Page: 456

View: 494

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Devoted to the preparation, characterization and evaluation of HTS electronic devices, this reference provides information on using high-Tc thin films and junctions to increase speed, lessen noise, lower power consumption and enhance upper frequency limits in superconductor electronics.
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High Temperature Cuprate Superconductors

The beginning of 1986 marked the inauguration of the cuprate superconduc- tor
epoch in the search for high-temperature superconductivity. The discovery by
Karl Alex Müller and Johan Georg Bednorz of the occurrence of
superconductivity in ...

Author: Nikolay Plakida

Publisher: Springer Science & Business Media

ISBN: 3642126332

Category: Technology & Engineering

Page: 570

View: 326

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High-Temperature Cuprate Superconductors provides an up-to-date and comprehensive review of the properties of these fascinating materials. The essential properties of high-temperature cuprate superconductors are reviewed on the background of their theoretical interpretation. The experimental results for structural, magnetic, thermal, electric, optical and lattice properties of various cuprate superconductors are presented with respect to relevant theoretical models. A critical comparison of various theoretical models involving strong electron correlations, antiferromagnetic spin fluctuations, phonons and excitons provides a background for understanding of the mechanism of high-temperature superconductivity. Recent achievements in their applications are also reviewed. A large number of illustrations and tables gives valuable information for specialists. A text-book level presentation with formulation of a general theory of strong-coupling superconductivity will help students and researches to consolidate their knowledge of this remarkable class of materials.
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Theory of High Temperature Superconductivity

of. overdoped. cuprates. What is the hardest thing of all? That which seems the
easiest For your eyes to see, That which lies before your eyes – Goethe 2.1
Introduction The discovery of high-temperature superconductivity [1,24] in
cuprates and ...

Author: T. Mishonov

Publisher: World Scientific

ISBN: 9789814343145

Category: Technology & Engineering

Page: 259

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Key discoveries concerning the different biological functions of microglia in health and disease have attracted scientists from various fields. In Microglia: Methods and Protocols, expert researchers in the field detail methods for selection of the key cellular, molecular and biochemical techniques that are used in studying the many and varied functions of this fascinating cell. These methods and techniques include microglia cell culture for studying microglia activation and functions, as well as their interaction with other cell types both in vitro and in vivo. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and key tips on troubleshooting and avoiding known pitfalls. Authoritative and practical, Microglia: Methods and Protocols is a useful resource for cell biologists, molecular biologists, immunologists, oncologist and neuroscientists.
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New Topics in Superconductivity Research

Many universities, research institutes and companies are working to develop high-Tc superconductivity applications and considerable progress has been made. This volume brings together new leading-edge research in the field.

Author: Barry P. Martins

Publisher: Nova Publishers

ISBN: 1594549850

Category: Science

Page: 315

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Superconductivity is the ability of certain materials to conduct electrical current with no resistance and extremely low losses. High temperature superconductors, such as La2-xSrxCuOx (Tc=40K) and YBa2Cu3O7-x (Tc=90K), were discovered in 1987 and have been actively studied since. In spite of an intense, world-wide, research effort during this time, a complete understanding of the copper oxide (cuprate) materials is still lacking. Many fundamental questions are unanswered, particularly the mechanism by which high-Tc superconductivity occurs. More broadly, the cuprates are in a class of solids with strong electron-electron interactions. An understanding of such "strongly correlated" solids is perhaps the major unsolved problem of condensed matter physics with over ten thousand researchers working on this topic. High-Tc superconductors also have significant potential for applications in technologies ranging from electric power generation and transmission to digital electronics. This ability to carry large amounts of current can be applied to electric power devices such as motors and generators, and to electricity transmission in power lines. For example, superconductors can carry as much as 100 times the amount of electricity of ordinary copper or aluminium wires of the same size. Many universities, research institutes and companies are working to develop high-Tc superconductivity applications and considerable progress has been made. This volume brings together new leading-edge research in the field.
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Phase Transition Approach to High Temperature Superconductivity

J. R. Waldram, Superconductivity of Metals and Cuprates, IOP Publishing, Bristol,
1996. • G. Burns, High-Temperature Superconductivity: An Introduction,
Academic Press, Boston, 1992. • R. Micnas and S. Robaszkiewicz, Theory
Aspects of ...

Author: T Schneider

Publisher: World Scientific

ISBN: 9781783261635

Category: Technology & Engineering

Page: 444

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The discovery of superconductivity at 30 K by Bednorz and Müller in 1986 ignited an explosion of interest in high temperature superconductivity. The initial development rapidly evolved into an intensive worldwide research effort — which still persists after more than a decade — to understand the phenomenon of cuprate superconductivity, to search for ways to raise the transition temperature and to produce materials which have the potential for technological applications. During the past decade of research on this subject, significant progress has been made on both the fundamental science and technological application fronts. A great deal of experimental data is now available on the cuprates, and various properties have been well characterized using high quality single crystals and thin films. Despite this enormous research effort, however, the underlying mechanisms responsible for superconductivity in the cuprates are still open to question. This book offers an understanding from the phase transition point of view, surveys and identifies thermal and quantum fluctuation effects, identifies material-independent universal properties and provides constraints for the microscopic description of the various phenomena. The text is presented in a format suitable for use in a graduate level course. Contents:Ginzburg–Landau PhenomenologyGaussian Thermal FluctuationsSuperfluidity and the n-Vector ModelUniversality and Scaling Theory of Classical Critical Phenomena at Finite TemperatureExperimental Evidence for Classical Critical BehaviorQuantum Phase TransitionsImplicationsMean Field TreatmentXY ModelQuantum Phase TransitionsBCS TheorySuperconducting Properties of the Attractive Hubbard Model Readership: Researchers and graduate students interested in superconductivity. Keywords:High Temperature Superconductivity;Cuprate Superconductors;Ginzburg-Landau Phenomenology;Gaussian Thermal Fluctuations
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Strong Coupling Theory of High Temperature Superconductivity

The 1986 epoch-making discovery [1] by J. Georg Bednorz and K. Alex Muller of
superconductivity in cuprates at incredibly high temperatures by the accepted
standards is now recognised as one of the greatest scientific revolutions of the ...

Author: Alexandre S. Alexandrov

Publisher: Cambridge University Press

ISBN: 9781107354951

Category: Science

Page:

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High-temperature superconductivity has transformed the landscape of solid state science, leading to the discovery of new classes of materials, states of matter, and concepts. However, despite being over a quarter of a century since its discovery, there is still no single accepted theory to explain its origin. This book presents one approach, the strong-coupling or bipolaron theory, which proposes that high-temperature superconductivity originates from competing Coulomb and electron-phonon interactions. The author provides a thorough overview of the theory, describing numerous experimental observations, and giving detailed mathematical derivations of key theoretical findings at an accessible level. Applications of the theory to existing high-temperature superconductors are discussed, as well as possibilities of liquid superconductors and higher critical temperatures. Alternative theories are also examined to provide a balanced and informative perspective. This monograph will appeal to advanced researchers and academics in the fields of condensed matter physics and quantum-field theories.
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High Temperature Superconductivity

A coherent introduction to high temperature superconductivity, this volume will be invaluable to researchers in condensed matter physics, chemistry, materials science, and engineering.

Author: D.P Tunstall

Publisher: CRC Press

ISBN: 0750301716

Category: Science

Page: 404

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High Temperature Superconductivity provides a broad survey of high temperature superconductivity, discussing the adaptations of experimental and theoretical techniques and methods that take advantage of the revolutionary properties of high temperature superconductors. Distinguished engineers, chemists, and experimental and theoretical physicists introduce their own particular area of the field before going on to explain current theories and techniques. The book is divided into three sections: materials, mechanisms, and devices. Topics covered include synthetic approaches to the growth of new materials; optical, magnetic, and electrical characterization of synthesized materials; strong correlations; the magnon pairing mechanism; and technical background of device performance in new materials. A coherent introduction to high temperature superconductivity, this volume will be invaluable to researchers in condensed matter physics, chemistry, materials science, and engineering.
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Microstructure and Properties of High Temperature Superconductors

Triple perovskite (“hybrid” rutheno-cuprate superconductor) RuSr2 GdCu2O8
consists of both “superconducting” CuO2 layers and “ferromagnetic” RuO2 layers
. Herein, superconductivity co-exists with electronic ferromagnetism in
microscopic ...

Author: I. A. Parinov

Publisher: Springer Science & Business Media

ISBN: 9783540709770

Category: Technology & Engineering

Page: 586

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This book provides a comprehensive presentation of all types of HTSC and includes a broad overview on HTSC computer simulations and modeling. Especial attention is devoted to the Bi-Sr-Ca-Cu-O and Y-Ba-Cu-O families that today are the most perspective for applications. The book includes a great number of illustrations and references. The monograph is addressed to students, post-graduate students and specialists, taking part in the development, preparation and researching of new materials.
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High Temperature Superconductors

This is what happens at temperatures from 0 to 30K. ... High. Tc. Cuprate.
Superconductor. All cuprate superconductors can be described by the general
compositional formula: (AO)m (BO)2 (M)n−1 (CuO2)n , where A is Bi or Tl (or Hg
) and B ...

Author: Ajay Kumar Saxena

Publisher: Springer Science & Business Media

ISBN: 9783642007125

Category: Technology & Engineering

Page: 224

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This book describes the phenomenon of superconductivity and high-temperature superconductors discovered by Bednorz and Muller in 1986. It covers all major experimental and theoretical developments in the field as well as many applications.
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High Temperature Superconductors HTS for Energy Applications

4 Bulk high temperature superconductor (HTS) materials Abstract: This chapter
concentrates on bulk materials. ... This discovery stimulated a great deal of
additional research in high temperature superconductivity on cuprate materials
with ...

Author: Ziad Melhem

Publisher: Elsevier

ISBN: 9780857095299

Category: Science

Page: 432

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High temperature superconductors (HTS) offer many advantages through their application in electrical systems, including high efficiency performance and high throughput with low-electrical losses. While cryogenic cooling and precision materials manufacture is required to achieve this goal, cost reductions without significant performance loss are being achieved through the advanced design and development of HTS wires, cables and magnets, along with improvements in manufacturing methods. This book explores the fundamental principles, design and development of HTS materials and their practical applications in energy systems. Part one describes the fundamental science, engineering and development of particular HTS components such as wires and tapes, cables, coils and magnets and discusses the cryogenics and electromagnetic modelling of HTS systems and materials. Part two reviews the types of energy applications that HTS materials are used in, including fault current limiters, power cables and energy storage, as well as their application in rotating machinery for improved electrical efficiencies, and in fusion technologies and accelerator systems where HTS magnets are becoming essential enabling technologies. With its distinguished editor and international team of expert contributors, High temperature superconductors (HTS) for energy applications is an invaluable reference tool for anyone involved or interested in HTS materials and their application in energy systems, including materials scientists and electrical engineers, energy consultants, HTS materials manufacturers and designers, and researchers and academics in this field. Discusses fundamental issues and developments of particular HTS components Comprehensively reviews the design and development of HTS materials and then applications in energy systems Reviews the use of HTS materials and cabling transmissions, fault alignment limiters, energy storage, generators and motors, fusion and accelerator
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Photoemission Spectroscopy on High Temperature Superconductor

Since its discovery in 1986, the mechanism of high temperature
superconductivity in cuprates is still a mystery, and ... has been applied on
Bi2Sr2Ca1Cu2O8+δ superconductor, and many new phenomenons in cuprates
have been revealed.

Author: Wentao Zhang

Publisher: Springer Science & Business Media

ISBN: 9783642324727

Category: Technology & Engineering

Page: 140

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This book mainly focuses on the study of the high-temperature superconductor Bi2Sr2CaCu2O8 by vacuum, ultra-violet, laser-based, angle-resolved photoemission spectroscopy (ARPES). A new form of electron coupling has been identified in Bi2212, which occurs in the superconducting state. For the first time, the Bogoliubov quasiparticle dispersion with a clear band back-bending has been observed with two peaks in the momentum distribution curve in the superconducting state at a low temperature. Readers will find useful information about the technique of angle-resolved photoemission and the study of high-temperature superconductors using this technique. Dr. Wentao Zhang received his PhD from the Institute of Physics at the Chinese Academy of Sciences.
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Chemistry of High Temperature Superconductors

CHEMISTRY OF SUPERCONDUCTING BISMUTH , THALLIUM AND LEAD
CUPRATES J. GOPALAKRISHNAN Solid State and Structural Chemistry Unit
Indian Institute of Science Bangalore - 560012 , India ABSTRACT Solid state
chemistry ...

Author: Chintamani Nagesa Ramachandra Rao

Publisher: World Scientific

ISBN: 9810208057

Category: Technology & Engineering

Page: 509

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This review volume contains the most up-to-date articles on the chemical aspects of high temperature oxide superconductors. These articles are written by some of the leading scientists in the field and includes a comprehensive list of references. This is an essential volume for researchers working in the fields of ceramics, materials science and chemistry.
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High Temperature Superconductivity

Superconductors. Abstract The copper oxides (cuprates) stand out in their high T
c values, 135 K, and are only family that achieved Tc exceeding 100 K. Thanks to
the enormous research efforts over 28 years, understanding of the cuprates ...

Author: Shin-ichi Uchida

Publisher: Springer

ISBN: 9784431553007

Category: Technology & Engineering

Page: 92

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This book presents an overview of material-specific factors that influence Tc and give rise to diverse Tc values for copper oxides and iron-based high- Tc superconductors on the basis of more than 25 years of experimental data, to most of which the author has made important contributions. The book then explains why both compounds are distinct from others with similar crystal structure and whether or not one can enhance Tc, which in turn gives a hint on the unresolved pairing mechanism. This is an unprecedented new approach to the problem of high-temperature superconductivity and thus will be inspiring to both specialists and non-specialists interested in this field. Readers will receive in-depth information on the past, present, and future of high-temperature superconductors, along with special, updated information on what the real highest Tc values are and particularly on the possibility of enhancing Tc for each member material, which is important for application. At this time, the highest Tc has not been improved for 20 years, and no new superconductors have been discovered for 5 years. This book will encourage researchers as well as graduate-course students not to give up on the challenges in the future of high- Tc superconductivity.
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Theory of High Temperature Superconductivity

Flux quantization experiments indicate that the carriers, Cooper pairs (pairons), in the supercurrent have charge magnitude 2e, and that they move independently.

Author: S. Fujita

Publisher: Springer Science & Business Media

ISBN: 9781402001499

Category: Science

Page: 374

View: 744

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Flux quantization experiments indicate that the carriers, Cooper pairs (pairons), in the supercurrent have charge magnitude 2e, and that they move independently. Josephson interference in a Superconducting Quantum Int- ference Device (SQUID) shows that the centers of masses (CM) of pairons move as bosons with a linear dispersion relation. Based on this evidence we develop a theory of superconductivity in conventional and mate- als from a unified point of view. Following Bardeen, Cooper and Schrieffer (BCS) we regard the phonon exchange attraction as the cause of superc- ductivity. For cuprate superconductors, however, we take account of both optical- and acoustic-phonon exchange. BCS started with a Hamiltonian containing “electron” and “hole” kinetic energies and a pairing interaction with the phonon variables eliminated. These “electrons” and “holes” were introduced formally in terms of a free-electron model, which we consider unsatisfactory. We define “electrons” and “holes” in terms of the cur- tures of the Fermi surface. “Electrons” (1) and “holes” (2) are different and so they are assigned with different effective masses: Blatt, Schafroth and Butler proposed to explain superconductivity in terms of a Bose-Einstein Condensation (BEC) of electron pairs, each having mass M and a size. The system of free massive bosons, having a quadratic dispersion relation: and moving in three dimensions (3D) undergoes a BEC transition at where is the pair density.
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Studies of High Temperature Superconductors

In this review, after giving a brief summary of the experimental results in
conventional and high Tc cuprates superconductors, we describe the above cited
theoretical studies to explain the experimental results for the isotope coefficient. 2
.

Author: Anant Narlikar

Publisher: Nova Publishers

ISBN: 1560727357

Category: Science

Page: 246

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Studies Of High Temperature Superconductors Volume 29 -- Advances In Research & Applications
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Bismuth Based High Temperature Superconductors

Preface 2n In the years since the discovery of high - temperature ( high - T )
cuprate superconductors by Bednorz and ... and Tl - based ( Tl - Ba - Ca - Cu - O )
cuprates , which can be used at liquid nitrogen temperature , are attracting much
 ...

Author: Hiroshi Maeda

Publisher: CRC Press

ISBN: 082479690X

Category: Science

Page: 656

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Provides coverage of the ongoing investigations on bismuth-based high-temperature cuprate superconductors, integrating scattered research activities and literature from 70 leading scientists throughout the world. The text covers crystal structures and microstructures, reversible or equilibrium magnetic and thermal properties, atomic site tunnel spectroscopy, experimental studies concerning equilibrium phases, and more.
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