Symmetry And Asymmetry In Quasicrystals Or Amorphous Materials
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Symmetry And Asymmetry In Quasicrystals Or Amorphous Materials
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Author : Enrique Maciá Barber
language : en
Publisher:
Release Date : 2020-09-10
Symmetry And Asymmetry In Quasicrystals Or Amorphous Materials written by Enrique Maciá Barber and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-09-10 with categories.
About forty years after its discovery, it is still common to read in the literature that quasicrystals (QCs) occupy an intermediate position between amorphous materials and periodic crystals. However, QCs exhibit high-quality diffraction patterns containing a collection of discrete Bragg reflections at variance with amorphous phases. Accordingly, these materials must be properly regarded as long-range ordered materials with a symmetry incompatible with translation invariance. This misleading conceptual status can probably arise from the use of notions borrowed from the amorphous solids framework (such us tunneling states, weak interference effects, variable range hopping, or spin glass) in order to explain certain physical properties observed in QCs. On the other hand, the absence of a general, full-fledged theory of quasiperiodic systems certainly makes it difficult to clearly distinguish the features related to short-range order atomic arrangements from those stemming from long-range order correlations. The contributions collected in this book aim at gaining a deeper understanding on the relationship between the underlying structural order and the resulting physical properties in several illustrative aperiodic systems, including the border line between QCs and related complex metallic alloys, hierarchical superlattices, electrical transmission lines, nucleic acid sequences, photonic quasicrystals, and optical devices based on aperiodic order designs.
Quasicrystals
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Author : Christian Janot
language : en
Publisher:
Release Date : 1992
Quasicrystals written by Christian Janot and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Quasicrystals categories.
In 1984 physicists discovered a totally unexpected form of matter in the world of crystallography, a structure that appeared to contain five-fold symmetry axes, which cannot exist in strictly periodic structures. Such quasi-periodic structures became known as quasicrystals. In an effort to understand these structures, a theory that employed higher dimensional space groups was applied to them and new alloy phases were able to be created which exhibited the properties expected from this model. Thus many of the early controversies were dissolved. This primer is intended to provide a descriptive approach to the subject for those coming to it for the first time. The various practical, experimental, and theoretical topics are dealt with in an accessible style. The book includes problem sets and a computer program that generates a Penrose lattice. It serves as a valuable introduction to this important field for students and researchers in materials science, crystallography, and condensed matter physics.
Quasicrystals
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Author : Hans-Rainer Trebin
language : en
Publisher: John Wiley & Sons
Release Date : 2003-07-07
Quasicrystals written by Hans-Rainer Trebin and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-07-07 with Mathematics categories.
A comprehensive and up-to-date review, covering the broad range of this outstanding class of materials among intermetallic alloys. Starting with metallurgy and characterization, the authors continue on to structure and mathematical modeling. They use this basis to move on to dealing with electronic, magnetic, thermal, dynamic and mechanical properties, before finally providing an insight into surfaces and thin films. The authors belong to a research program on quasicrystals, sponsored by the German Research Society and managed by Hans-Rainer Trebin, such that most of the latest results are pre.
Useful Quasicrystals
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Author : Jean-Marie Dubois
language : en
Publisher: World Scientific
Release Date : 2005
Useful Quasicrystals written by Jean-Marie Dubois and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Technology & Engineering categories.
The aim of this book is to acquaint the reader with what the authors regard as the most basic characteristics of quasicrystals -- structure, formation and stability, and properties -- in relationship with the applications of quasicrystalline materials. Quasicrystals are fascinating substances that form a family of specific structures with strange physical, chemical and mechanical properties as compared to those of metallic alloys. This, on the one hand, requires a generalization of the crystallographic description of solids and is still stimulating intensive research to understand the most basic properties of quasicrystals. On the other hand, these properties open the way to technological applications, demonstrated or potential, mostly regarding energy savings. This valuable book discusses those various facets of quasicrystals in six chapters, ending with the authors' own interpretation of the properties with respect to their unique structure.
Quasicrystals
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Author : D. P. DiVincenzo
language : en
Publisher: World Scientific
Release Date : 1999
Quasicrystals written by D. P. DiVincenzo and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Science categories.
Quasicrystals: The State of the Art has proven to be a useful introduction to quasicrystals for mathematicians, physicists, materials scientists, and students. The original intent was for the book to be a progress report on recent developments in the field. However, the authors took care to adopt a broad, pedagogical approach focusing on points of lasting value. Many subtle and beautiful aspects of quasicrystals are explained in this book (and nowhere else) in a way that is useful for both the expert and the student. In this second edition, some authors have appended short notes updating their essays. Two new chapters have been added. Chapter 16, by Goldman and Thiel, reviews the experimental progress since the first edition (1991) in making quasicrystals, determining their structure, and finding applications. In Chapter 17, Steinhardt discusses the quasi-unit cell picture, a promising, new approach for describing the structure and growth of quasicrystals in terms of a single, repeating, overlapping cluster of atoms.
Quasicrystals Networks And Molecules Of Fivefold Symmetry
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Author : István Hargittai
language : en
Publisher: Wiley-VCH
Release Date : 1990
Quasicrystals Networks And Molecules Of Fivefold Symmetry written by István Hargittai and has been published by Wiley-VCH this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Crystallography categories.
Fundamental phenomena and laws of nature are related to symmetry and, accordingly, symmetry is one of science's basic concepts. Istvan Hargittai has written and edited extensively on the question of symmetry in chemistry, and he has here assembled some very interesting papers which deal with the question of symmetry as it relates to quasi- crystals, networks and their relationships within a fivefold symmetrical context. This information will be useful to chemists (particulary organic and computational chemists) in creating new chemical structures for specific new uses.
Site Symmetry In Crystals
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Author : Robert A Evarestov
language : en
Publisher:
Release Date : 1993-06-25
Site Symmetry In Crystals written by Robert A Evarestov and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-06-25 with categories.
Quasicrystals
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Author : Jens-Boie Suck
language : en
Publisher: Springer Science & Business Media
Release Date : 2002-07-23
Quasicrystals written by Jens-Boie Suck 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 2002-07-23 with Science categories.
The book provides an introduction to all aspects of the physics of quasicrystals. The chapters, each written by an expert in this field, cover quasiperiodic tilings and the modeling of the atomic structure of quasicrystals. The electronic density of states and the calculation of the electronic structure play a key role in this introduction, as does an extensive discussion of the atomic dynamics. The study of defects in quasicrystals by high resolution electron microscopy and the computer simulations of defects and fracture in decorated tilings are important subjects for the application of these aperiodic crystals.
Quasi Periodic Materials
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Author : Dan Shechtman
language : de
Publisher:
Release Date : 2019
Quasi Periodic Materials written by Dan Shechtman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Disordered Materials
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Author : Paolo Ossi
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-03-10
Disordered Materials written by Paolo Ossi 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 2010-03-10 with Science categories.
The teaching of solid state physics essentially concerns focusing on crystals and their properties. We study crystals and their properties because of the simple and elegant results obtained from the analysis of a spatially periodic system; this is why the analysis can be made considering a small set of atoms that represent the whole system of many particles. In contrast to the formal neat approach to crystals, the study of str- turally disordered condensed systems is somewhat complicated and often leads to relatively imprecise results, not to mention the experimental and computational e?ort involved. As such, almost all university textbooks, - cluding the advanced course books, only brie?y touch on the physics of am- phous systems. In any case, both the fundamental aspect and the ever wider industrial applications have given structurally disordered matter a role that should not be overlooked. The study of amorphous solids and their structure, stability and properties is a vibrant research branch; it is di?cult to imagine how any physicist, chemist or engineer who has to deal with materials could possibly ignore this class of systems. The author of Disordered Matter – an Introduction uses this course book atthePolitecnicoinMilan,Italy.Collectingthematerialforthecourseproved no mean task, leading him to have to prepare ad hoc didactic material. The continualexchangebetweenteacherandstudenthasledtothepresentversion of the book.