Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Here, the loss of single-particle coherence going from the superconducting state to the normal state in underdoped cuprates is a dramatic effect that has yet to be understood. Here, we address this issue by performing angle resolved photoemission spectroscopy measurements in the presence of a transport current. We find that the loss of coherence is associated with the development of an onset in the resistance, in that well before the midpoint of the transition is reached, the sharp peaks in the angle resolved photoemission spectra are completely suppressed. Since the resistance onset is a signature of phase fluctuations, this implies that the loss of single-particle coherence is connected with the loss of long-range phase coherence.
Author: Alexandre Revcolevschi
Publisher: World Scientific
ISBN: 9814547875
Category :
Languages : en
Pages : 454
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Book Description
Practical applications of the cuprates depend heavily on the coherence of their superconducting state. Introductory chapters of this book present the special problems posed by the strong anisotropy of the cuprates. They are followed by pedagogical reviews on fluctuation effects, the properties of the vortex state, physics of tunneling (s and d-wave superconductors), and properties of related junction devices. Preparation methods and advanced experiments on state of the art single crystals and thin films are emphasized.
Author: Jia-Su Wang
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110538431
Category : Science
Languages : en
Pages : 402
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Book Description
The authors begin this book with a systematic overview of superconductivity, superconducting materials, magnetic levitation, and superconducting magnetic levitation - the prerequisites to understand the latter part of the book - that forms a solid foundation for further study in High Temperature Superconducting Magnetic Levitation (HTS Maglev). This book presents our research progress on HTS Maglev at Applied Superconductivity Laboratory (ASCLab) of Southwest Jiaotong University (SWJTU), China, with an emphasis on the findings that led to the world‘s first manned HTS Maglev test vehicle "Century". The book provides a detailed description on our previous work at ASCLab including the designing of the HTS Maglev test and measurement method as well as the apparatus, building "Century", developing the HTS Maglev numerical simulation system, and making new progress on HTS Maglev. The final parts of this book discuss research and prototyping efforts at ASCLab in several adjacent fi elds including HTS Maglev bearing, Flywheel Energy Storage System (FESS) and HTS maglev launch technology. We hope this book becomes a valuable source for researchers and engineers working in the fascinating field of HTS Maglev science and engineering. Contents Fundamentals of superconductivity Superconducting materials Magnetic levitation Superconducting magnetic levitation HTS Maglev experimental methods and set-up First manned HTS Maglev vehicle in the world Numerical simulations of HTS Maglev New progress of HTS Maglev vehicle HTS Maglev bearing and flywheel energy storage system HTS Maglev launch technology
Author: Alfred Zong
Publisher: Springer Nature
ISBN: 3030817512
Category : Science
Languages : en
Pages : 234
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Book Description
This book advances understanding of light-induced phase transitions and nonequilibrium orders that occur in a broken-symmetry system. Upon excitation with an intense laser pulse, materials can undergo a nonthermal transition through pathways different from those in equilibrium. The mechanism underlying these photoinduced phase transitions has long been researched, but many details in this ultrafast, non-adiabatic regime still remain to be clarified. The work in this book reveals new insights into this phenomena via investigation of photoinduced melting and recovery of charge density waves (CDWs). Using several time-resolved diffraction and spectroscopic techniques, the author shows that the light-induced melting of a CDW is characterized by dynamical slowing-down, while the restoration of the symmetry-breaking order features two distinct timescales: A fast recovery of the CDW amplitude is followed by a slower re-establishment of phase coherence, the latter of which is dictated by the presence of topological defects in the CDW. Furthermore, after the suppression of the original CDW by photoexcitation, a different, competing CDW transiently emerges, illustrating how a hidden order in equilibrium can be unleashed by a laser pulse. These insights into CDW systems may be carried over to other broken-symmetry states, such as superconductivity and magnetic ordering, bringing us one step closer towards manipulating phases of matter using a laser pulse.
Author: Waldemar Gorzkowski
Publisher: World Scientific
ISBN: 9814555584
Category :
Languages : en
Pages : 412
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Book Description
This volume will focus on the theory and experiments leading to quantitative understanding of the magnetic field and temperature dependence of critical current densities in high-temperature superconductors. Topics will include: critical currents and flux-pinning, flux flow and flux creep, anisotropy of critical fields and currents, properties of the flux lattice and the irreversibility line, magnetization, granularity.
Author: Julien Bok
Publisher: Springer Science & Business Media
ISBN: 0306470810
Category : Science
Languages : en
Pages : 560
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Book Description
Since the discovery in 1986 of high temperature superconductors by J. G. Bednorz and K. A. Müller, a considerable progress has been made and several important scientific problems have emerged. Within this NATO Advanced Study Institute our intention was to focus mainly on the controversial topic of the symmetry of the superconducting gap and given the very short coherence length, the role of fluctuations. The Institute on ‘The Gap Symmetry and Fluctuations in High- Superconductors’ took place in the “Institut d’Etudes Scientifiques de Cargèse” in Corsica, France, between 1 - 13 September 1997. The 110 participantsfrom 18 countries (yet 30 nationalities) including 23 full time lecturers, have spent two memorable weeks in this charming Mediterranean resort. All lecturers were asked to prepare pedagogical papers to clearly present the central physical idea behind specific model or experiment. The better understanding of physics of high temperature superconductivity is certainly needed to guide the development of applications of these materials in high and weak current devices.
Author: Thomas Sheahen
Publisher: Springer Science & Business Media
ISBN: 0306470616
Category : Science
Languages : en
Pages : 578
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Book Description
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.
Author: A. Mourachkine
Publisher: Springer Science & Business Media
ISBN: 0306480638
Category : Science
Languages : en
Pages : 326
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Book Description
“The Frontiers of Knowhledge (to coin a phrase) are always on the move. - day’s discovery will tomorrow be part of the mental furniture of every research worker. By the end of next week it will be in every course of graduate lectures. Within the month there will be a clamour to have it in the undergraduate c- riculum. Next year, I do believe, it will seem so commonplace that it may be assumed to be known by every schoolboy. “The process of advancing the line of settlements, and cultivating and c- ilizing the new territory, takes place in stages. The original papers are p- lished, to the delight of their authors, and to the critical eyes of their readers. Review articles then provide crude sketch plans, elementary guides through the forests of the literature. Then come the monographs, exact surveys, mapping out the ground that has been won, adjusting claims for priority, putting each fact or theory into its place” (J. M. Ziman, Principles of the Theory of Solids (Cambridge University Press, 1972) p.v). The main purpose of the book is to present the mechanism of - perconductivity discovered in 1986 by J. G. Bednorz and K. A. Müller, and to discuss the physics of superconductors. The last chapter of the book presents analysis of tunneling measurements in cuprates. The book is - dressed to researchers and graduate students in all branches of exact sciences.
Author: A. V. Narlikar
Publisher: Nova Science Publishers
ISBN:
Category : High Temperature Superconductors
Languages : en
Pages : 440
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Book Description
Superconductivity has been transformed into a rich field of intensive and highly competitive research, encompassing diverse disciplines such as structural chemistry, ceramic engineering, metallurgy, solid state electronics as well as experimental and theoretical condensed matter physics. The high temperature superconductors (HTSCs) discovered are from the family of ceramic oxides. Their large scale utilisation in electrical utilities and in microelectronic devices are challenges which can perhaps be effectively met only through consolidated efforts and expertise of a multidisciplinary nature. The growth of the new field has occurred on an international scale and perhaps has been more rapid than in most other fields. Each chapter in these volumes comprises a detailed review or an extended paper focussing on one or more of the aspects of research and applications, including state-of-art technology pertaining to HTSCs.
Author: Alexandre Revcolevschi
Publisher:
ISBN: 9789814531221
Category : SCIENCE
Languages : en
Pages : 454
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Book Description
