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Neutron Scattering Studies Of Spin Correlations In Metallic Yba Sub 2 Cu Sub 3 O Sub 6 X
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Book Synopsis Neutron Scattering Studies of Spin Correlations in Metallic YBa Sub 2 Cu Sub 3 O Sub 6+x by :
Download or read book Neutron Scattering Studies of Spin Correlations in Metallic YBa Sub 2 Cu Sub 3 O Sub 6+x written by and published by . This book was released on 1991 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron-electron correlations appear to play an important role in determining many properties of the copper oxide superconductors. One significant consequence of the electronic coulomb interactions are spin correlations. In the insulating phases of the layered cuprates, where the antibonding band due to Cu 3d(subscript x)2 - {sub y}2-O 2p{sub {sigma}} hybridization in the CuO2 planes is half filled, long-range antiferromagnetic order is observed. As the layers are doped with holes, the Neel order is rapidly destroyed, but dynamical antiferromagnetic correlations survive. In this paper, I will review some inelastic neutron scattering studies of the spin fluctuations in metallic YBa2Cu3O{sub 6+x}. The paper is organized as follows. In the first section I briefly discuss some background information concerning the phase diagram and spin waves in the insulating phase. Experimental results on metallic YBa2Cu3O{sub 6+x} samples are presented in the second section. The interpretation of these results and their relationship to nuclear magnetic resonance (NMR) studies and to theory are discussed in the final section.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1989 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutron Scattering Studies of Spin Correlations in Metallic YBa2Cu3O6+x by :
Download or read book Neutron Scattering Studies of Spin Correlations in Metallic YBa2Cu3O6+x written by and published by . This book was released on 1991 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1991-11 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications of the National Institute of Standards and Technology ... Catalog by : National Institute of Standards and Technology (U.S.)
Download or read book Publications of the National Institute of Standards and Technology ... Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1991 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications by : United States. National Bureau of Standards
Download or read book Publications written by United States. National Bureau of Standards and published by . This book was released on 1991 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Temperature Superconductivity by : Shin-ichi Uchida
Download or read book High Temperature Superconductivity written by Shin-ichi Uchida and published by Springer. This book was released on 2014-11-20 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author :Chris Stock Publisher :Library and Archives Canada = Bibliothèque et Archives Canada ISBN 13 :9780494028919 Total Pages :366 pages Book Rating :4.0/5 (289 download)
Book Synopsis Neutron Scattering Studies of Superconducting YBa↓2Cu↓2O↓6↓+↓x and Relaxor Ferroelectrics Pb(Mg↓1↓ by : Chris Stock
Download or read book Neutron Scattering Studies of Superconducting YBa↓2Cu↓2O↓6↓+↓x and Relaxor Ferroelectrics Pb(Mg↓1↓ written by Chris Stock and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2005 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lattice dynamics and structural properties were measured in the ferroelectrics Pb(Mg1/3Nb2/3)O3 and Pb(Zn1/3Nb 2/3)O3. Relaxor ferroelectrics have attracted much attention recently due to their exceptional piezoelectric properties. Despite the previous belief that these two materials are very different, the lattice dynamics are found to be nearly identical. The main difference between the two materials is the presence of a large near-surface region in Pb(Zn1/3Nb 2/3)O3 which undergoes a well defined structural transition. The relaxor transition can be interpreted in terms of a random field model where the appropriate universality class is the three-dimensional Heisenberg model with cubic anisotropy. The random field model can be further applied to reconcile previous apparent conflicting interpretations of the lattice dynamics.Neutron scattering is an important tool in studying the structure, lattice vibrations, and spin dynamics in materials. Neutron elastic and inelastic scattering was used in this work to investigate the fluctuations and the structure in the YBa2CuO6+x superconductor as well as the relaxor ferroelectrics Pb(Mg1/3Nb2/3)O 3 and Pb(Zn1/3Nb2/3)O3. The spin fluctuations in the YBa2Cu3O6+x superconductor were studies for x in the underdoped region with x = 0.5 (Tc = 59 K). YBa2Cu 3O6.5 has good structural properties with well ordered oxygen chains. This provides a unique opportunity to study the spin fluctuations in a high-temperature superconductor in the presence of minimal structural disorder. The spin response in the YBa2Cu3O6.5 superconductor has been investigated using both time-of-flight and triple-axis spectrometers up to energy transfers of about 110 meV. The spin spectrum in YBa2Cu3O6.5 is dominated by a strong resonance at 33 meV. The low-energy scattering is characterized by one-dimensional incommensurate scattering with incommensurate peaks displaced along [100] direction. The high-energy fluctuations in the range from ho = 40--100 meV are qualitatively similar to the linear spin-waves measured in the insulator.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1990 with total page 1604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutron Scattering in Layered Copper-Oxide Superconductors by : Albert Furrer
Download or read book Neutron Scattering in Layered Copper-Oxide Superconductors written by Albert Furrer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: The phenomenon of superconductivity - after its discovery in metals such as mercury, lead, zinc, etc. by Kamerlingh-Onnes in 19]] - has attracted many scientists. Superconductivity was described in a very satisfactory manner by the model proposed by Bardeen, Cooper and Schrieffer, and by the extensions proposed by Abrikosov, Gorkov and Eliashberg. Relations were established between superconductivity and the fundamental properties of solids, resulting in a possible upper limit of the critical temperature at about 23 K. The breakthrough that revolutionized the field was made in 1986 by Bednorz and Muller with the discovery of high-temperature superconductivity in layered copper-oxide perovskites. Today the record in transition temperature is 133 K for a Hg based cuprate system. The last decade has not only seen a revolution in the size of the critical temperature, but also in the myriads of research groups that entered the field. In addition, high-temperature superconductivity became a real interdisciplinary topic and brought together physicists, chemists and materials scientists who started to investigate the new compounds with almost all the available experimental techniques and theoretical methods. As a consequence we have witnessed an avalanche of publications which has never occurred in any field of science so far and which makes it difficult for the individual to be thoroughly informed about the relevant results and trends. Neutron scattering has outstanding properties in the elucidation of the basic properties of high-temperature superconductors.
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ceramic Abstracts by : American Ceramic Society
Download or read book Ceramic Abstracts written by American Ceramic Society and published by . This book was released on 1993 with total page 1252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Advisory Committee on Technology and Society Publisher :National Academies Press ISBN 13 :9780309037860 Total Pages :1298 pages Book Rating :4.0/5 (378 download)
Book Synopsis Cities and Their Vital Systems by : Advisory Committee on Technology and Society
Download or read book Cities and Their Vital Systems written by Advisory Committee on Technology and Society and published by National Academies Press. This book was released on 1989 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cities and Their Vital Systems asks basic questions about the longevity, utility, and nature of urban infrastructures; analyzes how they grow, interact, and change; and asks how, when, and at what cost they should be replaced. Among the topics discussed are problems arising from increasing air travel and airport congestion; the adequacy of water supplies and waste treatment; the impact of new technologies on construction; urban real estate values; and the field of "telematics," the combination of computers and telecommunications that makes money machines and national newspapers possible.
Download or read book INIS Atomindex written by and published by . This book was released on 1988 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography written by Pierre Villars and published by Walter de Gruyter. This book was released on 2012-12-21 with total page 1827 pages. Available in PDF, EPUB and Kindle. Book excerpt: By browsing about 10 000 000 scientific articles of over 200 major journals mainly in a 'cover to cover approach' some 200 000 publications were selected. The extracted data is part of the following fundamental material research fields: crystal structures (S), phase diagrams (also called constitution) (C) and the comprehensive field of intrinsic physical properties (P). This work has been done systematically starting with the literature going back to 1900. The above mentioned research field codes (S, C, P) as well as the chemical systems investigated in each publication were included in the present work. The aim of the Inorganic Substances Bibliography is to provide researchers with a comprehensive compilation of all up to now published scientific publications on inorganic systems in only three handy volumes.
