Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 17
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Book Description
The de Haas van Alphen effect has been investigated using 100 tesla fields and temperatures below 4.2 Kelvin. It is concluded from these measurements that YBCO exhibits a Fermi surface with at least three separate extremal frequencies for the c-axis parallel to the applied field. Orbital masses, renormalization g's and scattering rates are estimated from an amplitude analysis. 16 refs., 2 figs.
Author: Leon Gunther
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
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Book Description
The report shows that the critical temperature T sub c(H) of a type-II superconductor exhibits dHvA oscillations with the usual period mu/omega sub c, where mu is the Fermi energy and omega sub c = eH/mc is the cyclotron frequency. The result includes electron spin and is valid even outside the Ginzburg-Landau region. It demonstrates the feasibility of observing the effect at low temperatures through the oscillations of the resistivity in the transition region. (Author).
Author: Donald M Ginsberg
Publisher: World Scientific
ISBN: 9813221798
Category : Science
Languages : en
Pages : 642
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Book Description
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.
Author: Donald M. Ginsberg
Publisher: World Scientific
ISBN: 9789810216375
Category : Technology & Engineering
Languages : en
Pages : 592
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Book Description
This volume contains two chapters of direct interest for applications: The magnetic vortex states and transformations and the effects of c-axis coupling on the transport properties. In addition, the isotope effect is reviewed, since reliable data on ultra-pure samples are now available. The lattice vibrations (phonons) have been explored extensively by inelastic neutron scattering and infrared absorption and these types of data are reviewed as well. The interesting properties of the superconducting doped fullerenes are described; some of their most fundamental properties are shared by the superconducting cuprates. This book with its subject index, like the earlier three volumes in this series, will be found useful both by people entering the field and by workers who are already active in it.
Author: Robin Corcoran
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Sadamichi Maekawa
Publisher: Springer Science & Business Media
ISBN: 3642847188
Category : Technology & Engineering
Languages : en
Pages : 427
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Book Description
Advances through carefully conducted quantitative work on well designed, high quality materials characterize the present state of high-temperature superconductivity research. The contributions to this volume present a theoretical and experimental overview of electronic structure and physical properties, including anisotropic features, of high-temperative materials, with a focus on cuprates. In order to enhance the understanding of the mechanisms of superconductivity at high temperatures, this volume is divided into theoretical and experimental parts. The contributions to the two parts correspond to each other, giving readers involved in either area of research activity a reference to findingsof the other. On the other hand, this book gives young physicists high-level information on the present state of research, enhanced by tutorial contributions of leading physicists in the field.
Author: Josef Ashkenazi
Publisher: Springer Science & Business Media
ISBN:
Category : Science
Languages : en
Pages : 688
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Book Description
Proceedings of the University of Miami Workshop on Electronic Structure and Mechanisms of High-Temperature Superconductivity, held January 1991, in Coral Gables, Florida. Experimental work in this volume includes reports of photoemission spectra, positron annihilation, the de Haas-van Alphen effect,
Author: J. Ashkenazi
Publisher: Springer Science & Business Media
ISBN: 1461533384
Category : Science
Languages : en
Pages : 653
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Book Description
This volume contains the proceedings of the University of Miami Workshop on the subject of "Electronic Structure and Mechanisms for High Temperature Super conductivity". The workshop was held at the James L. Knight Physics Building on the campus of the University of Miami, Coral Gables, 3-9 January 1991. Some 106 scientists from 12 countries attended this workshop, most of whom presented either invited or contributed papers. The reader will find in this volume a series of papers discussing the most im portant experimental and theoretical developments as of winter/spring 1990/1991. Despite more than four years of intensive research on high-T materials, there has c been considerable controversy both with respect to the interpretation of experiment and even more so in connection with the construction of an appropriate theory. In this regard, workshops such as this, gathering scientists with many viewpoints, and varying specialization, and fostering constructive discussions, are important in the de velopment of a common ground. Of major concern in the present context were the basic physical processes involved in high-temperature superconductivity.
Author: Nikolai M. Plakida
Publisher: Springer Science & Business Media
ISBN: 3642784062
Category : Technology & Engineering
Languages : en
Pages : 236
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Book Description
High-Temperature Superconductors provides an up-to-date and comprehensive review of the properties of these fascinating materials. Much has been learned about the behavior and mechanism of this novel type of superconductivity over the past five years, but many questions remain unanswered. This book gives an invaluable survey which will help students and researchers to consolidate their knowledge and build upon it. A large number of illustrations and tables give valuable information for specialists. A critical comparison of different theoretical models involving strong electron correlations, spin fluctuations, phonons and excitons provides a background for understanding modern trends in the theory of high-temperature superconductivity.
Author: Nie Luo
Publisher: CRC Press
ISBN: 1000000729
Category : Political Science
Languages : en
Pages : 289
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Book Description
The exciton mechanism of high-Tc superconductivity in copper oxides was initially proposed by Prof. J. Bardeen. His insight is largely shared by another luminary in superconductivity, Prof. V. L. Ginzburg. The main author of the book, Dr. Nie Luo, was motivated by their insights to give a geometrical explanation to the excitonic Coulomb interaction and has developed a unique formalism to understand and predict physical properties of high-Tc superconductors. This work is supported by increasingly strong evidence for electron–hole interactions in p-type cuprates. The presence of electrons in hole-doped cuprates is revealed by the works of the authors and many others, including the late Prof. L. P. Gor’kov. The book also tries to understand the interlayer Coulomb (ILC) pairing model by the excitonic Coulomb interaction. Developed by Prof. A. J. Leggett, ILC theory shares many views with Ginzburg’s approach. The other author of the book, Prof. George H. Miley, shares with us his personal experience with Prof. Bardeen on the exciton’s role in physics problems including high-Tc superconductivity. The results and predictions of this excitonic Coulomb mechanism have been verified by an increasing number of experiments. This book summarizes the current status and fathoms future directions.
