Download or read book Design and Synthesis of Organic Superconductors written by and published by . This book was released on 1996 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal objectives of this work were the design, synthesis, and preliminary characterization of new organic conductors and superconductors. Electrocrystallization facilities were constructed that accommodate 96 crystal growth cells. Crystal formation takes place in a temperature-controlled (plus or minus 0.1 C). vibrationally-isolated, (vertical isolation efficiency at 10 Hz in 60-90%), inert-atmosphere environment. A variety of radical-cation salts of bis(ethylenedithio)tetraselenafulvalene were grown and characterized by crystallography, tight-binding band calculations, electronic transport, magnetic properties, and a number of other solid-state methods. Significant findings include the discovery of a tetrachlorogallate salt that is a superconductor with a transition temperature 5.5 deg higher than any previously known organic material containing selenium and magnetoresistance studies on mercury thiocyanate salts that suggest that strong electron-electron interactions are important in promoting and enhancing superconductivity in organic superconductors. A new organic conductor precursor, bis(ethylenedithio)tetrathionaphthalene, was synthesized and several of its conducting salts were investigated in a preliminary manner. Numerous collaborative studies were undertaken.
Download or read book Design Synthesis and Characterization of Organic Superconductors and Superconductor Precursors written by David B. Engel and published by . This book was released on 2002 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Superconductors written by Takehiko Ishiguro and published by . This book was released on 1998-10-16 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Synthesis of Organic Superconductors FY92 URI RIP written by and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of mixed-valence (2:1), conducting salts of bis(ethylenedithio)tetraselena-fulvalene (BETS) have been prepared. Four (GaCl(4), SbF(6), CF(3)SO(3) and CuN(CN)(2)Br) have been characterized in detail (X-ray crystallography, DC resistivity from 300-1 OK, rf penetration depth measurements (0.5K), pressure studies from 0.5-5 kbar at 4K, and tight-binding band calculations). The salts are highly metallic to low temperatures but do not exhibit superconductivity under the experimental conditions explored. The synthesis of a new synthetic metal precursor, bis(ethylenedithio) tetrathionaphthalene (BEDT-TTN), is about three-quarters completed. Spin density wave (SDW) and charge density wave (CDW) phenomena of three organic superconductors (k-(BEDT-TTF)CuN(CN)(2)Cl, (TMTSF)2PF6, and (TMTSF)(2)ReO(4), where BEDTTTF is bis(ethylenedithio)tetrathiafulvalene and TMTSF is tetramethyltetraselenafulvalene) have been studied in collaboration with Professor J.W. Brill (Department of Physics, University of Kentucky). The three organic metals avert the SDW and CDW transitions under pressure and become superconductors. Organic superconductor, Synthesis, Structure, Resistivity, SDW, CDW.
Download or read book Design Synthesis and Characterization of Organic Conductors and Superconductors written by Kyle P. Starkey and published by . This book was released on 1999 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Superconductors written by Takehiko Ishiguro and published by . This book was released on 1990 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: The initial impetus for the search for an organic superconductor was the proposal of the existence of a polymer superconductor with a high critical temperature (Tc). This spurred on activities having the aim of synthesizing and characterizing organic conductors, which had already been going on for two decades. These efforts have resulted in the thriving field of low dimensional conductors and superconductors. This monograph is intended to be an introduction to and review of the study of organic conductors and superconductors. The investigations are to warrant a treatise of some length. At the same time sufficiently rich they have produced a few active subfields, each containing exciting topics. This situation seems to necessitate a monograph describing the current status of the field for both researchers and newcomers to the field. Such a need may also be felt by scientists engaged in the study of the high-Tc oxide superconductors for comparison of the two kinds of new supercon ductors, which share some important aspects, for example, the low-dimen sionality and the competition or coexistence of superconductivity and magnetism. However, available experimental and theoretical results are sometimes conflicting and have not yet been arranged into a coherent standard picture of the whole field. Further developments are continually being reported and therefore it is still premature to write a textbook about some of the topics. However, we have tried to include discussions of recent topics in this volume.
Download or read book Design Strategies for the Preparation of Polymeric Organic Superconductors written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This program has, as its stated goal, the design of the first organic polymeric superconductor. In year one we have embarked on the design of several model compounds so as to ascertain the most appropriate synthetic methodology for the polymer systems, and to determine the existence of any potential problems in solubility and processibility parameters in the chosen systems. Upon synthesis the redox properties of the model compounds and their compatibility with various counter ions will be determined, as well as their packing efficiency via x-ray spectroscopy.
Download or read book Organic Superconductors including Fullerenes written by Jack Marvin Williams and published by . This book was released on 1992 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive coverage of organic superconductors, this guide details the synthesis, structure, conductivity, superconductivity and theoretical concepts of the subject. The book is intended for chemists, physicists and material scientists.
Download or read book Organic Superconductivity written by Vladimir Z. Kresin and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains papers presented at the International Conference on Organic Superconductivity which was held May 20-24, 1990, at the Stanford Sierra Conference Center, South Lake Tahoe, California. In the twenty years since the First Conference on Organic Superconductivity was held (Hawaii, 1969), there has been remarkable progress in the field. At present, development is accelerating with contributions from many groups in many countries worldwide. The discovery of high Tc superconductivity by G. Bednorz and K. Muller in 1986 and subsequent developments in the ceramic superconductors have had an enormous impact on the field of superconductivity as a whole. This discovery occurred in an area entirely different from that of conventional superconduc tivity, underscoring the importance of the search for and study of novel materials of all kinds. We believe that the organics, with their wide range of structural, chemical, and physical properties, belong in this category of novel materials. This book reflects the efforts of researchers from various disciplines: physicists, chemists, and materials scientists. It addresses the normal and superconducting properties of organic materials, as well as the search for new compounds and new syntheses. We are pleased to note that one of these papers reports on the discovery of a new organic superconductor with a record high Tc in this class. One chapter is devoted to a comparison of organic superconductors and the cuprates, another, to the prospects of discovering other novel conducting or superconducting compounds.
Download or read book Rational Design of Organic Superconductors Through the Use of the Large Discrete Molecular Anions M CF3 4 M written by and published by . This book was released on 1996 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new approach to synthesis of organic superconductors has recently been pioneered which involves the use of large discrete molecular anions as the charge-compensating entities in these charge transfer salts. The organic electron-donor molecule bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF or ET) has been electrocrystallized with the novel organometallic M(CF3)4− (M=Cu, Ag, Au) anions in a variety of 1,1,2-trihaloethane solvents. Over 20 organic superconductors have been synthesized which can be described by (ET)2M(CF3)4(1,1,2- trihaloethane). These solvated salts are shown to have highly anisotropic physical properties which can be tuned via modifications of each of their three molecular components: ET electron donor molecule, M(CF3)4− anion, and neutral 1,1,2- trihaloethane solvent molecule. Superconductivity has also been observed in an ET salt containing the discrete SF5CH2CF2SO3− anion with onset temperature near 5.2 K.
Download or read book Organic Superconductors written by Takehiko Ishiguro and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic Superconductors is an introduction to organic conductors and superconductors and a review of the current status of the field. First, organic conductors are described, then the structures and electronic properties of organic superconductors are discussed, illustrated with examples of typical compounds. The book deals in detail with theories of the mechanism of superconductivity, and more briefly with spin-density waves. The design, principle, and synthesis of organic superconductors are also described. This second edition covers the research activities of the last few years.
Download or read book Electronic Structure of Organic Semiconductors written by Luís Alcácer and published by Morgan & Claypool Publishers. This book was released on 2018-12-07 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written in the perspective of an experimental chemist, this book puts together some fundamentals from chemistry, solid state physics and quantum chemistry, to help with understanding and predicting the electronic and optical properties of organic semiconductors, both polymers and small molecules. The text is intended to assist graduate students and researchers in the field of organic electronics to use theory to design more efficient materials for organic electronic devices such as organic solar cells, light emitting diodes and field effect transistors. After addressing some basic topics in solid state physics, a comprehensive introduction to molecular orbitals and band theory leads to a description of computational methods based on Hartree-Fock and density functional theory (DFT), for predicting geometry conformations, frontier levels and energy band structures. Topological defects and transport and optical properties are then addressed, and one of the most commonly used transparent conducting polymers, PEDOT:PSS, is described in some detail as a case study.
Download or read book Multifunctional Conducting Molecular Materials written by Gunzi Saito and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of conducting molecular materials is a rapidly developing, multidisciplinary field of research, offering a wide variety of possibilities for the future. It is of particular relevance to nano fabrication and technology because it offers high density, small size integrated and multifunctional properties that can be fabricated under mild conditions. Multifunctional Conducting Molecular Materials covers a wide range of topics including: molecular conductors and superconductors; design and synthesis of functional molecular materials; organic/inorganic hybrids and photoinduced phenomena; fullerenes, nanotubes and other related nano materials. The book concludes with a look at integration and functionalities of molecular materials such as organic field effect transistors (OFET). This high level book is ideal for researchers in both industry and academia who are interested in this new and exciting field.
Download or read book Advances in Organic Conductors and Superconductors written by Martin Dressel and published by MDPI. This book was released on 2018-10-04 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Advances in Organic Conductors and Superconductors" that was published in Crystals
Download or read book The Physics of Superconductors written by Karl-Heinz Bennemann and published by Springer Science & Business Media. This book was released on 2004-04-07 with total page 1166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second volume of a comprehensive two-volume treatise on superconductivity that represents the first such publication since the earlier widely acclaimed books by R. Parks. It systematically reviews the basic physics and recent advances in the field. Leading researchers describe the state of the art in conventional phonon-induced superconductivity, high-Tc superconductivity, and in novel superconductivity, including triplet pairing in the ruthenates. The second volume is largely concerned with novel superconductors, such as heavy-fermion metals and organic materials, and also includes granular superconductors. Important new results on current problems are presented in a manner designed to stimulate further research. Numerous illustrations, diagrams and tables make this book especially useful as a reference work for students, teachers and researchers. Volume 1 treats Conventional and High-Tc Superconductors (3-540-43883-1).
Download or read book Quasi one dimensional Organic Superconductors written by Wei Zhang and published by World Scientific. This book was released on 2018-06-22 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book includes a thorough description of a wide range of physical properties of organic superconductors of reduced dimensionality. The authors start with an overview of the field followed by a background discussion and selected experimental topics. A critical discussion of theoretical proposals is presented under the constraints of experimental observations and exciting possibilities for the symmetry of the order parameter are presented, including the cases of inhomogeneous superconducting states and triplet superconductivity. The possible origins of Cooper pairing are explored and tests to detect experimentally the pairing symmetry are described in detail. The book ends with a discussion of important open questions, where the search for their answers will keep the field alive for the next decade.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
