Recent Developments In Superconductivity Research

Author : Barry P. Martins
Publisher : Nova Publishers
Page : 366 pages
File Size : 52,5 Mb
Release : 2007
Category : Technology & Engineering
ISBN : 1600214622

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Recent Developments in Superconductivity Research by Barry P. Martins Pdf

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.

Author : Barry P. Martins
Publisher : Nova Publishers
Page : 334 pages
File Size : 41,8 Mb
Release : 2006
Category : Technology & Engineering
ISBN : 1594549850

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New Topics in Superconductivity Research by Barry P. Martins Pdf

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.

Author : James R. Tobin
Publisher : Nova Publishers
Page : 268 pages
File Size : 55,8 Mb
Release : 2008
Category : Technology & Engineering
ISBN : 1600218482

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Superconductivity Research Developments by James R. Tobin Pdf

Superconductivity is a phenomenon occurring in certain materials at extremely low temperatures, characterized by exactly zero electrical resistance and the exclusion of the interior magnetic field (the Meissner effect). The electrical resistivity of a metallic conductor decreases gradually as the temperature is lowered. However, in ordinary conductors such as copper and silver, impurities and other defects impose a lower limit. Even near absolute zero a real sample of copper shows a non-zero resistance. The resistance of a superconductor, on the other hand, drops abruptly to zero when the material is cooled below its "critical temperature", typically 20 kelvin or less. An electrical current flowing in a loop of superconducting wire can persist indefinitely with no power source. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It cannot be understood simply as the idealisation of "perfect conductivity" in classical physics. Superconductivity occurs in a wide variety of materials, including simple elements like tin and aluminium, various metallic alloys and some heavily-doped semiconductors. Superconductivity does not occur in noble metals like gold and silver, nor in most ferromagnetic metals. In 1986 the discovery of a family of cuprate-perovskite ceramic materials known as high-temperature superconductors, with critical temperatures in excess of 90 kelvin, spurred renewed interest and research in superconductivity for several reasons. As a topic of pure research, these materials represented a new phenomenon not explained by the current theory. And, because the superconducting state persists up to more manageable temperatures, more commercial applications are feasible, especially if materials with even higher critical temperatures could be discovered. This new book presents leading research from around the world in this dynamic field.

Author : Christopher B. Taylor
Publisher : Nova Science Publishers
Page : 0 pages
File Size : 42,9 Mb
Release : 2013
Category : Superconductivity
ISBN : 1626184062

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Recent Advances in Superconductivity Research by Christopher B. Taylor Pdf

The authors of this book present current research in the study of superconductivity. Topics discussed in this compilation include the effects of non-magnetic defects in hole doped cuprates; deep cryogenic refrigeration by photons based on the phonon deficit effect in superconductors; superconductivity driven by an anti-polar electric phase in high temperature superconducting materials; superconductive graphite intercalation compounds; a superconducting magnetic field concentrator with nanodimensional branches and slits; magnetic mechanisms of pairing in a strongly correlated electron system of copper oxides; two non-linear mechanisms of correlations between copper carriers in superconductivity and their microscopical descriptions; three dimensionality of the critical state and variational methods for magnetically anisotropic superconductors; theory of multi-band superconductivity; conserving approximation for the self-energy of the t-U-V-J model beyond the Hartree-Fock approximation; and superconductivity as a consequence of an ordering of zero-point oscillations in electron gas.

Author : Jan Klamut,Boyd Veal,Bodgan M. Dabrowski
Publisher : Unknown
Page : 380 pages
File Size : 48,5 Mb
Release : 2014-01-15
Category : Electronic
ISBN : 3662140950

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Recent Developments in High Temperature Superconductivity by Jan Klamut,Boyd Veal,Bodgan M. Dabrowski Pdf

Author : Ross W. Stevens
Publisher : Nova Biomedical Books
Page : 254 pages
File Size : 42,8 Mb
Release : 2003
Category : Science
ISBN : UOM:39015058239131

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New Developments in Superconductivity Research by Ross W. Stevens Pdf

High-Tc superconductors 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 book presents leading research from around the world in this exciting field.

Author : Tetsuo Watanabe
Publisher : Nova Publishers
Page : 242 pages
File Size : 40,5 Mb
Release : 2008
Category : Technology & Engineering
ISBN : 1604560177

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Leading-edge Superconductivity Research Developments by Tetsuo Watanabe Pdf

This new book focuses on superconductivity which 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, worldwide, 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.

Author : Li-Chun Liáng
Publisher : Nova Publishers
Page : 248 pages
File Size : 42,5 Mb
Release : 2008
Category : Science
ISBN : 1604560835

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YBCO Superconductor Research Progress by Li-Chun Liáng Pdf

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, 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. This Publication presents new research on yttrium barium copper oxide superconductors, often abbreviated YBCO, which is a chemical compound with the formula YBa2Cu3O7. This material, a famous 'high-temperature superconductor', achieved prominence because it was the first material to superconduct above the boiling point of nitrogen. All materials developed before YBCO became superconducting only at temperatures near the boiling points of liquid helium or liquid hydrogen (Tb = 20.1 K). The significance of the discovery of YBCO is the breakthrough in the refrigerant used to cool the material to below the critical temperature.

Author : United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Energy Research and Development
Publisher : Unknown
Page : 292 pages
File Size : 42,5 Mb
Release : 1988
Category : Superconductivity
ISBN : LOC:00002599211

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Superconductivity by United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Energy Research and Development Pdf

Author : Donglu Shi
Publisher : Elsevier
Page : 480 pages
File Size : 46,8 Mb
Release : 1995-02-20
Category : Technology & Engineering
ISBN : 0080534171

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High-Temperature Superconducting Materials Science and Engineering by Donglu Shi Pdf

This book explores the fascinating field of high-temperature superconductivity. Basic concepts–including experimental techniques and theoretical issues–are discussed in a clear, systematic manner. In addition, the most recent research results in the measurements, materials synthesis and processing, and characterization of physical properties of high-temperature superconductors are presented. Researchers and students alike can use this book as a comprehensive introduction not only to superconductivity but also to materials-related research in electromagnetic ceramics. Special features of the book: presents recent developments in vortex-state properties, defects characterization, and phase equilibrium introduces basic concepts for experimental techniques at low temperatures and high magnetic fields provides a valuable reference for materials-related research discusses potential industrial applications of high-temperature superconductivity includes novel processing technologies for thin film and bulk materials suggests areas of research and specific problems whose solution can make high-Tc superconductors a practical reality

Author : J. Ashkenazi,Mikhail V. Eremin,Joshua L. Cohn,Ilya Eremin,Dirk Manske,Davor Pavuna,Fuliln Zuo
Publisher : Springer Science & Business Media
Page : 296 pages
File Size : 54,7 Mb
Release : 2005-11-02
Category : Science
ISBN : 1402030835

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New Challenges in Superconductivity: Experimental Advances and Emerging Theories by J. Ashkenazi,Mikhail V. Eremin,Joshua L. Cohn,Ilya Eremin,Dirk Manske,Davor Pavuna,Fuliln Zuo Pdf

This volume contains the proceedings of the 2004 University of Miami Workshop on Unconventional Superconductivity. The workshop was the fourth in a series of successful meetings on High-T Superconductivity and C related topics, which took place at the James L. Knight Physics Building on the University of Miami campus in Coral Gables, Florida, in January 1991, 1995, 1999, and 2004. The workshop consisted of two consecutive events: 1. NATO Advanced Research Workshop (ARW) on New Challenges in Superconductivity: Experimental Advances and Emerging Theories, held on January 11-14, 2004; 2. Symposium on Emerging Mechanisms for High Temperature Superconductivity (SEMHTS), held on January 15-16, 2004. It is hard to write a balanced preface to a volume like this one, yet at least we try to offer the reader a taste of what was happening in this workshop. There were close to a hundred scientists from around the world, albeit fewer Russians than we had originally hoped for. Nevertheless, the workshop was very lively and we trust that this is demonstrated in this volume. The workshop included high-quality presentations on state of the art works, yet a key issue, discussed by many, was how homogeneous the cuprates are. STM data, as well as other reports, showed that the cuprate superconductors (SC’s) studied were inhomogeneous, especially in the underdoped regime; while experiments, like ARPES and magnetoresistance have established the existence of a Fermi Surface (FS), at least above some doping level, in the cuprates.

Author : A. V. Narlikar
Publisher : Unknown
Page : 128 pages
File Size : 49,7 Mb
Release : 1989
Category : High temperature superconductors
ISBN : 0941743543

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Studies of High Temperature Superconductors by A. V. Narlikar Pdf

Author : Krityunjai Prasad Sinha,S. L. Kankani
Publisher : Unknown
Page : 240 pages
File Size : 53,7 Mb
Release : 1989
Category : Science
ISBN : UOM:39015016944053

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Magnetic Superconductors by Krityunjai Prasad Sinha,S. L. Kankani Pdf

In eight chapters (several quite brief) the authors review for the benefit of professional peers the theoretical/experimental status of the topic to which their title refers, with emphasis on its relation to high-temperature superconductivity. Includes glossary and thirteen pages of references. Prod

Author : Oliver A. Chang
Publisher : Nova Publishers
Page : 220 pages
File Size : 42,9 Mb
Release : 2008
Category : Science
ISBN : 1600216943

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Progress in Superconductivity Research by Oliver A. Chang Pdf

This book presents state-of-the art research on superconductivity which 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.

Author : Alexander Gabovich
Publisher : BoD – Books on Demand
Page : 282 pages
File Size : 49,9 Mb
Release : 2015-08-24
Category : Technology & Engineering
ISBN : 9789535121336

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Superconductors by Alexander Gabovich Pdf

The chapters included in the book describe recent developments in the field of superconductivity. The book deals with both the experiment and the theory. Superconducting and normal-state properties are studied by various methods. The authors presented investigations of traditional and new materials. In particular, studies of oxides, pnictides, chalcogenides and intermetallic compounds are included. The superconducting order parameter symmetry is discussed and consequences of its actual non-conventional symmetry are studied. Impurity and tunneling effects (both quasiparticle and Josephson ones) are among topics covered in the chapters. Special attention is paid to the competition between superconductivity and other instabilities, which lead to the Fermi surface gapping.