Quasi-one-dimensional Organic Superconductors


Book Description

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.




Organic Conductors and Semiconductors


Book Description

Remarks -- Quantum solitons in one-dimensional conductors -- Infrared problems and phase transitions of continuous order in low-dimensional systems -- Scaling. Theory of a one-dimensional fermi gas model with two characteristic energies -- On the Efetov-Larkin model of a strongly interacting one-dimensional system -- Cluster expansion methods applied to a I-d Fermion system -- Magnetic susceptibility of a one-dimensional Fermion-system -- Excitations in the antiferromagnetic Heisenberg chain -- Displacement correlation of classical ions in the incommensurate Frèohlich model of a one-dimensional metal -- High temperature structural instability in quasi-one-dimensional conductors -- On the charge distribution and the lattice distortion of quasi-one-dimensional systems -- Quasi-one-dimensional systems -- The role of interchain coupling in linear conductors -- Three-dimensional ordering in the system of weakly coupled chains -- Order in coupled metallic chains -- The two-chain problem: A model of TTF-TCNQ -- On the problem of phase transitions in quasi-id metallic systems -- The exciton model of superconductivity in linear chains - revisited -- Excitonic "superfluidity" in low-dimensional crystals -- The impurity effect on the phase transitions in the quasi-one-dimensional conductors -- Singularity of the electronic density of states due to impurities in the ID-systems with the half-filled zone -- Conductivity of quasi-one-dimensional metal systems with random impurities at T=O -- Impurity pinning of charge density wave in the Peierls-Frohlich state -- Disordered quasi-one-dimensional materials -- The effect of phonons on localization and electroconductivity in ld conductors -- Symmetry changes and phase transitions in TTF-TCNQ -- Perpendicular phase dependence in (TTF) (TCNQ) -- A model for the metal-insulator transition in TSeF-TCNQ -- Chiral charge density waves in quasi one-dimensional organic conductors -- The Peierls instability in the ID metal TTF-TCNQ -- Organic conductors derived from substituted tetraselenafulvalenes -- Chemical trends in organic conductors: Stabilization of the nearly one-dimensional metallic state -- Optical properties of hexamethylene-tetraselenafulvalinium tetracyanoquinodi-methanide (HMTSF-TCNQ) -- X-ray scattering of TSeF-TCNQ and HMTSeF-TCNQ -- Observation of a large hall effect in HMTSF-TCNQ below room temperature -- Nuclear spin relaxation studies of one-dimensional organic conductors, TTF-TCNQ and HMTSF-TCNQ -- Magnetic properties of one-dimensional charge transfer conductors: Pressure effects -- Some remarks on the microwave permittivity measurements of organic semiconductors -- Organic alloys -- Organic conductors with low-symmetric acceptors -- Neutron and X-ray diffuse scattering study of tetrathiofulvalene tetracyanoouinodimethane (TTF-TCNQ) -- Optical evidence for coulomb interactions in TTF-TCNQ -- Anisotropy in the critical behavior of TTF-TCNQ and TSeF-TCNQ -- Magnetic susceptibility of TTF-TCNQ single crystals in the phase transition region -- New, highly conductive, organic solids -- The new class of the quasi-one-dimensional organic metals - The cation-radical salts of the TTT -- Physical properties of a charge transfer complex with TCNQ and iodine: Evidence of a latttice distortion -- Structure, physical properties and phase transition of a TCNQ salt of 1 : 2 stoichiometry : DECA (TCNQ)2 -- Phase transition in Py(TCNQ)2 -- Dynamic nuclear polarization in TTF-TCNQ and K. TCNQ -- Electrical and magnetic properties of complexes of 2,2?,6,6?-tetramethyl--4,4?-bipyrylene (TMBP) and 2,2?,6,6?--tetramethyl-4,4?-bithiopyrylene (TMBTP) with hexacyanobenzene (HCNB) -- Intensities of the infrared absorption in TCNQ salts -- Triplet excitons in simple TCNQ salts -- Interchain coupling and disorder in complex tcnq salts with aromatic donors -- TCNQ salts with symmetric and asymmetric donors -- Investigations of high conductivity of dipyranylidene and dithiadipyranylidene - TCNQ complexes -- Electronic properties of organic and polymeric metals -- Electronic structure and optical properties of polysulfur nitride, (SN)x -- Acoustic phonons of polymeric sulfur nitride, (SN)x -- X-ray and ultraviolet photoemission of polymeric sulfur nitride (SN)x -- Superconducting properties of (SN)x -- Quantum chemical studies on (SN)x -- Galvanomagnetic effects in polymeric sulfur nitride, (SN)x -- Experimental evidence for solitary-wave excitations in GCP -- Synthesis of linear chain transition metal complexes -- Phonon-assisted mobilities in organic molecular crystals (anthracene) -- On the possible mechanisms of conductivity in biopolymers and charge transfer molecular crystals -- On the conductivity of some organic dyes.










Organic Conductors


Book Description

This work examines all aspects of organic conductors, detailing recent theoretical concepts and current laboratory methods of synthesis, measurement, control and analysis. It describes advances in molecular-scale engineering, including switching and memory systems, Schottky and electroluminescent diodes, field-effect transistors, and photovoltaic devices and solar cells.




Low-dimensional Organic Conductors


Book Description

This book is a review of physical properties of organic conductors and superconductors. It is amply illustrated and contains numerous data concerning the latest elements and equipment constructed of low-dimensional organic conductors. It is hoped that the book will be stimulating for technologists and designers working on contemporary electronics.




Interacting Electrons in Reduced Dimensions


Book Description

As its name suggests, the 1988 workshop on "Interacting Electrons in Reduced Dimen the wide variety of physical effects that are associated with (possibly sions" focused on strongly) correlated electrons interacting in quasi-one- and quasi-two-dimensional mate rials. Among the phenomena discussed were superconductivity, magnetic ordering, the metal-insulator transition, localization, the fractional Quantum Hall effect (QHE), Peierls and spin-Peierls transitions, conductance fluctuations and sliding charge-density (CDW) and spin-density (SDW) waves. That these effects appear most pronounced in systems of reduced dimensionality was amply demonstrated at the meeting. Indeed, when concrete illustrations were presented, they typically involved chain-like materials such as conjugated polymers, inorganic CDW systems and organie conductors, or layered materials such as high-temperature copper-oxide superconductors, certain of the organic superconductors, and the QHE samples, or devices where the electrons are confined to a restricted region of sample, e. g. , the depletion layer of a MOSFET. To enable this broad subject to be covered in thirty-five lectures (and ab out half as many posters), the workshop was deliberately focused on theoretical models for these phenomena and on methods for describing as faithfully as possible the "true" behav ior of these models. This latter emphasis was especially important, since the inherently many-body nature of problems involving interacting electrons renders conventional effec tive single-particle/mean-field methods (e. g. , Hartree-Fock or the local-density approxi mation in density-functional theory) highly suspect. Again, this is particularly true in reduced dimensions, where strong quantum fluctuations can invalidate mean-field results.




Organic Superconductors


Book Description

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.




Selected Papers Of Lev P Gor'kov


Book Description

The author of this unique volume, Lev P Gor'kov is internationally renowned for his seminal contribution in the fundamentals of the Theory of Superconductivity, Theory of Metals, the field of Quantum Statistical Physics, and more generally, Organic Metals and the like. Each reprints' group is preceded by the author's introductions and commentaries clarifying the formulation of a problem, summarizing the essence of the results and placing them in the context of recent developments. The author belongs to the last generation of scientists who were the direct disciples of the legendary Russian theorist Lev Landau. And Gor'kov's achievements reflect the unique style and the originality of this famous Scientific School. As with other Russian scientists of his generation, many of the pioneering papers by Lev Gor'kov have been published in the Russian journals that are hard-to-reach for modern readers, students and postdocs. Allowing readers a glimpse into the various ways that the field of condensed matter physics was evolving for more than half a century, the volume is a valuable source for historians of science.