Download or read book Specific Heat Jump in High Tc Superconductors written by P. W. O. Nyawere and published by LAP Lambert Academic Publishing. This book was released on 2011-07 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superconductivity of high-Tc cuprates and their transition temperature is strongly dependent on the content and ordering of oxygen deficiencies. It is not clear how pairing of oxygen atoms occur in these structures, but it is believed that the existence of several equivalent positions of oxygen atoms causes a strong anharmonic perturbation. In this work we seek to confirm that BCS theory is insufficient in explaining the electron-electron pairing in high-Tc superconductors and that the type of pairing is exotic as has been reported in (18). The nature of characteristic curves are similar confirming that this exotic pairing applies to all materials which have high-Tc. The transition is smooth and not abrupt jump as is known in normal superconductors. We report various values of specific heat jump and various ratios between normal state and superconducting states. These values are close to the experimental values so far reported though in some few cases their are divergence from the expected values. These values can be used to explain the thermodynamic characteristics of high-Tc superconductors.
Download or read book Electronic Specific Heat Discontinuity at Critical Temperature of High Tc Superconductors written by Suchat Kaskamalas and published by . This book was released on 1999 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this thesis is to investigate the specific heat jump at the critical temperature of high-Tc superconductor having the constant and the Van Hove Singularity density of states. By using the theory of Bardeen, Cooper, and Schrieffer (BCS) and considering the pairing states to be isotropic s-wave and anisotropic d-wave, we calculate the ratio between the jump in the specific heat and the normal phase specific heat at the critical temperature as a function of the debye frequency, the critical temperature, and the fermi energy, the results show significant deviations from the BCS value of 1.43.
Download or read book Physical Properties of High Temperature Superconductors written by Rainer Wesche and published by John Wiley & Sons. This book was released on 2015-07-07 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: A much-needed update on complex high-temperature superconductors, focusing on materials aspects; this timely book coincides with a recent major break-through of the discovery of iron-based superconductors. It provides an overview of materials aspects of high-temperature superconductors, combining introductory aspects, description of new physics, material aspects, and a description of the material properties This title is suitable for researchers in materials science, physics and engineering. Also for technicians interested in the applications of superconductors, e.g. as biomagnets
Download or read book Physical Properties Of High Temperature Superconductors Ii written by Donald M Ginsberg and published by World Scientific. This book was released on 1990-02-01 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of Physical Properties of High Temperature Superconductors I, research in the field of high temperature superconductivity has continued at a rapid pace. Volume II will contain chapters on some of the major areas of activity which were not covered extensively in Volume I: structure, microstructure, thermodynamics, oxygen stoichiometry effects, nuclear magnetic and quadrupole resonance, Hall effect, electronic structure, and the pairing state. Like Volume I, it will present authoritative and comprehensive reviews written by recognized experts in the field. This book should be useful to all students, scientists, and engineers who desire to know more about high temperature superconductivity.
Download or read book Physical Properties of High Temperature Superconductors written by Rainer Wesche and published by John Wiley & Sons. This book was released on 2015-05-13 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: A much-needed update on complex high-temperaturesuperconductors, focusing on materials aspects; this timely bookcoincides with a recent major break-through of the discovery ofiron-based superconductors. It provides an overview of materials aspects of high-temperaturesuperconductors, combining introductory aspects, description of newphysics, material aspects, and a description of the materialproperties This title is suitable for researchers inmaterials science, physics and engineering. Also for techniciansinterested in the applications of superconductors, e.g. asbiomagnets
Download or read book Lectures On High Temperature Superconductivity written by Gan Z Z and published by #N/A. This book was released on 1991-10-31 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first part of these proceedings contains the invited lectures which aim to unify and summarize briefly the systematic knowledge and latest developments in the entire spectrum of high Tc superconductivity, including the phenomenological and microscopic theory on HTS, crystal structures and defects, the fabrication of high Tc superconductors, physical properties of HTSC, tunneling junctions and electronics of HTSC, etc. The second part consists of the abstracts of all reports given at the seminar sessions.
Download or read book High Tc Superconductors written by Harald W. Weber and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past two years conferences on superconductivity have been characterized by the attendance of hundreds of scientists. Consequently, the organizers were forced to schedule numerous parallel sessions and poster presentations with an almost unsurveyable amount of information. It was, therefore, felt that a more informal get-together, providing ample time for a thourough discussion of some topics of current interest in high-temperature superconductivity, was timely and benefitial for leading scientists as well as for newcomers in the field. The present volume contains the majority of papers presented at the International Discussion Meeting on High-Tc Superconductors held at the Mauterndorf Castle in the Austrian Alps from February 7 to 11, 1988. Each subject was introduced in review form by a few invited speakers and then discussed together with the contributed poster presentations. These discussion sessions chaired by selected scientists turned out to be the highlights of the meeting, not only because all the participants truly appreciated the possibility of an information exchange, but mainly because of the magnificent job done by the discussion chairmen, John A. Mydosh (Leiden), Martin Peter (Geneva) and Ken E. Gray (Argonne). First results on the just discovered Bi-superconductors and the clarification of electron resonance experiments on (123)-compounds should be mentioned in particular. The relaxed atomosphere favoring free discussions was certainly promoted by the surroundings offered in the Mauterndorf Castle, which dates back to 1253. Poster presentations and a conference banquet in historic knight's halls are certainly not found everyday in conference routines.
Download or read book High temperature Superconductivity written by Nikolaĭ Maksimilianovich Plakida and published by . This book was released on 1995 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical Properties of High Temperature Superconductors written by and published by . This book was released on 1990 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Specific Heat of Unconventional Superconductors written by Borko Djurkovic and published by . This book was released on 2010 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: PrOs4Sb12 is the first known heavy fermion superconductor containing Pr. Many experiments show results indicating unconventional superconductivity in this system. Most notably, PrOs4Sb12 exhibits two superconducting transitions. The upper transition occurs at Tc1 ≈ 1.89 K and the lower transition occurs at Tc2 ≈ 1.72 K. There are many features of this system that are not understood and do not have a unifi ed consensus among researchers. Many issues remain unanswered, such as the origin of superconductivity, symmetry of the superconducting energy gap, and the nature of the two superconducting transitions. We present specific heat data for a single PrOs4Sb12 crystal. The data show two superconducting transitions. Variance in the lower superconducting transition (among various samples) suggests multiple superconducting phases. Power law dependence of the low temperature specific heat is indicative of asymmetric energy gap. Cuprates are unconventional high temperature superconductors. The theory on origin and characteristics of superconductivity in these systems is still a debated issue. Experiments indicate presence of a phase in these systems that occurs above the superconducting transition temperature which exhibits some common characteristics with the superconducting state. An important issue is the nature of this so-called "pseudogap" phase and its relationship to the superconducting state. We have developed an experimental apparatus and procedure for measuring the specific heat of a high temperature superconductor and demonstrated it by measuring the heat capacity of a YBCO high-Tc superconductor sample.
Download or read book Physical Properties of High Temperature Superconductors II written by Donald M. Ginsberg and published by World Scientific. This book was released on 1990 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of Physical Properties of High Temperature Superconductors I, research in the field of high temperature superconductivity has continued at a rapid pace. Volume II will contain chapters on some of the major areas of activity which were not covered extensively in Volume I: structure, microstructure, thermodynamics, oxygen stoichiometry effects, nuclear magnetic and quadrupole resonance, Hall effect, electronic structure, and the pairing state. Like Volume I, it will present authoritative and comprehensive reviews written by recognized experts in the field. This book should be useful to all students, scientists, and engineers who desire to know more about high temperature superconductivity.
Download or read book Physical Properties Of High Temperature Superconductors Iv written by Donald M Ginsberg and published by World Scientific. This book was released on 1994-04-13 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book High Temperature Cuprate Superconductors written by Nikolay Plakida and published by Springer Science & Business Media. This book was released on 2010-08-26 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Introduction to High Temperature Superconductivity written by Thomas Sheahen and published by Springer Science & Business Media. This book was released on 1994-09-30 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawing from physics, mechanical engineering, electrical engineering, ceramics, and metallurgy, high-temperature superconductivity (HTSC) spans nearly the entire realm of materials science. This volume presents each of those disciplines at an introductory level, such that readers will ultimately be able to read the literature in the field. The volu.
Download or read book Functional Derivatives of the Specific Heat Jump at Tc for a Superconducting Proximity Effect Junction written by Craig T. Benson and published by . This book was released on 1988 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies of High Temperature Superconductors written by A. V. Narlikar and published by Nova Science Publishers. This book was released on 1990 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: See preceding entry. Annotation copyright Book News, Inc. Portland, Or.
Download or read book High Temperature Superconductivity written by Nikolai M. Plakida and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
