Inhomogeneous Superconductivity
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Inhomogeneous Superconductivity
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Author : Lucian Covaci
language : en
Publisher:
Release Date : 2007
Inhomogeneous Superconductivity written by Lucian Covaci and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Inhomogeneous materials categories.
Inhomogeneous Superconductors
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Author : Eugen Simanek
language : en
Publisher: Oxford University Press
Release Date : 1994-09-08
Inhomogeneous Superconductors written by Eugen Simanek and has been published by Oxford University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994-09-08 with Science categories.
Two topics in the forefront of superconductor research--superconductor-insulator transition in thin films and vortex tunneling in granular, bulk, and high temperature superconductors--have never before been given a unified and deductive treatment. This monograph and text provides a much-needed, comprehensive introduction to the theory of quantum fluctuations in inhomogenous superconducting materials. It be will be of great use to students and researchers in disciplines such as superconductivity, many-body systems, phase transitions, submicron physics, and surface science.
Inhomogeneous Superconductors
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Author : Eugen Šimánek
language : en
Publisher:
Release Date : 2023
Inhomogeneous Superconductors written by Eugen Šimánek and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023 with Fluctuations (Physics) categories.
Represents the unified treatment of an important field of research - the theory of quantum fluctuations in inhomogeneous superconductivity materials. This book can be used as a main or supplementary text in graduate courses on superconductivity, many-body systems, phase transitions, submicron physics, and surface science.
Statistical Mechanics Of Superconductivity
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Author : Takafumi Kita
language : en
Publisher: Springer
Release Date : 2015-05-05
Statistical Mechanics Of Superconductivity written by Takafumi Kita and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-05-05 with Technology & Engineering categories.
This book provides a theoretical, step-by-step comprehensive explanation of superconductivity for undergraduate and graduate students who have completed elementary courses on thermodynamics and quantum mechanics. To this end, it adopts the unique approach of starting with the statistical mechanics of quantum ideal gases and successively adding and clarifying elements and techniques indispensible for understanding it. They include the spin-statistics theorem, second quantization, density matrices, the Bloch–De Dominicis theorem, the variational principle in statistical mechanics, attractive interaction and bound states. Ample examples of their usage are also provided in terms of topics from advanced statistical mechanics such as two-particle correlations of quantum ideal gases, derivation of the Hartree–Fock equations, and Landau’s Fermi-liquid theory, among others. With these preliminaries, the fundamental mean-field equations of superconductivity are derived with maximum mathematical clarity based on a coherent state in terms of the Cooper-pair creation operator, a quasiparticle field for describing the excitation and the variational principle in statistical mechanics. They have the advantage that the phase coherence due to the Cooper-pair condensation can be clearly seen making the superfluidity comprehensible naturally. Subsequently, they are applied to homogeneous cases to describe the BCS theory for classic s-wave superconductors and its extension to the p-wave superfluidity of 3He. Later, the mean-field equations are simplified to the Eilenberger and Ginzburg–Landau equations so as to describe inhomogeneous superconductivity such as Abrikosov’s flux-line lattice concisely and transparently. Chapters provide the latest studies on the quasiclassical theory of superconductivity and a discovery of p-wave superfluidity in liquid 3He. The book serves as a standard reference for advanced courses of statistical mechanics with exercises along with detailed answers.
Nanoscience And Engineering In Superconductivity
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Author : Victor Moshchalkov
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-11-10
Nanoscience And Engineering In Superconductivity written by Victor Moshchalkov and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-11-10 with Science categories.
For emerging energy saving technologies superconducting materials with superior performance are needed. Such materials can be developed by manipulating the "elementary building blocks" through nanostructuring. For superconductivity the "elementary blocks" are Cooper pair and fluxon (vortex). This book presents new ways how to modify superconductivity and vortex matter through nanostructuring and the use of nanoscale magnetic templates. The basic nano-effects, vortex and vortex-antivortex patterns, vortex dynamics, Josephson phenomena, critical currents, and interplay between superconductivity and ferromagnetism at the nanoscale are discussed. Potential applications of nanostructured superconductors are also presented in the book.
Emergent Superconductivity In Low Dimensions
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Author : Diane Ansermet
language : en
Publisher: Springer
Release Date : 2018-11-19
Emergent Superconductivity In Low Dimensions written by Diane Ansermet and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-19 with Technology & Engineering categories.
This book explores the relationship between electronic correlations, dimensionality, inhomogeneities, and superconductivity in low-dimensional systems by studying single crystals of the quasi-one-dimensional Na2–δMo6Se6, composed of MoSe filaments weakly coupled by Na atoms and subject to intrinsic disorder (δ > 0). It shows that the Na2-δMo6Se6 displays strong electronic correlations in its normal state, whereas a superconducting ground state emerges from Anderson localized electrons. Two novel behaviors of the superconducting state are observed: first, a disorder induced enhancement of the superconducting transition temperature; second, a reentrant phase coherence with increasing temperature, magnetic field, and current. It also analyzes the intrinsic properties of Na2-δMo6Se6 are analyzed to offer a thorough understanding of these phenomena. The emergence of superconductivity in such low-dimensional systems provides a fruitful playground to explore electronic order and correlations.
Inhomogeneous Superconductors
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Author : E. Šimánek
language : en
Publisher:
Release Date : 1981
Inhomogeneous Superconductors written by E. Šimánek and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with categories.
Pseudogap And Precursor Superconductivity Study Of Zn Doped Ybco
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Author : Ece Uykur
language : en
Publisher: Springer
Release Date : 2015-02-26
Pseudogap And Precursor Superconductivity Study Of Zn Doped Ybco written by Ece Uykur and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-26 with Technology & Engineering categories.
In this thesis, the pseudogap and the precursor superconducting state, which are of great importance in clarifying the superconductivity mechanism in high-temperature cuprate superconductors, are investigated with a c-axis optical study in YBa2(Cu1-xZnx)3Oy. Testing was performed over a wide energy range with smaller temperature intervals for several Zn-substituted samples, as well as for several carrier-doping levels. A spectral weight (SW) analysis, in which the pseudogap behavior can be separated from the superconducting condensate with the SW transfer to the high-energy region, revealed that the pseudogap is not the precursor of the superconductivity (carriers moving to the high-energy region with pseudogap opening never contribute to the superconducting condensation). Moreover, the high-energy transfer continues even below Tc for the Zn-substituted samples (in which we weaken the superconductivity), which gives evidence to the coexistence of the pseudogap and the superconducting gap below Tc. On the other hand, the analysis of optical conductivity revealed that a precursor state to superconductivity can be defined at temperatures much higher than Tc. The superconducting carrier density (ns) was calculated for each temperature (above and below Tc) and the results confirmed the existence of ns at temperatures above Tc. The observed real superconducting condensate (ns) above Tc puts a serious constraint on the theory for high- Tc superconductivity. A theory based on an inhomogeneous superconducting state, in which a microscopically phase-separated state in a doped Mott insulator can be observed, is the most plausible candidate. This theory can explain the existence of ns and the observed temperature range for the precursor superconducting state. The results obtained show that the pseudogap coexists with superconductivity below Tc and is not the precursor of superconductivity. On the other hand, it is also possible to define a precursor superconducting state that is different than the pseudogap. The temperature range and the observed superconducting condensate in this state can be explained with the help of the inhomogeneous superconducting state.
Nonequilibrium Superconductivity
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Author : Vitaliĭ Lazarevich Ginzburg
language : en
Publisher: Nova Publishers
Release Date : 1988
Nonequilibrium Superconductivity written by Vitaliĭ Lazarevich Ginzburg and has been published by Nova Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Science categories.
Inhomogeneous Superconductors 1979 Berkeley Springs W V
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Author : Donald Urban Gubser
language : en
Publisher:
Release Date : 1980
Inhomogeneous Superconductors 1979 Berkeley Springs W V written by Donald Urban Gubser and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Medical categories.