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Crystal Growth and Stoichiometry of Strongly Correlated Intermetallic Cerium Compounds (Book chapter)

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ISBN: 9789533076102 Year: DOI: 10.5772/29675 Language: English
Publisher: IntechOpen Grant: FP7 Ideas: European Research Council - 227378
Subject: Science (General)
Added to DOAB on : 2019-01-17 11:47:58
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Strongly correlated electron systems are among the most active research topics in modern condensed matter physics. In strongly correlated materials the electron interaction energies dominate the electron kinetic energy which leads to unconventional properties. Heavy fermion compounds form one of the classes of such materials. In heavy fermion compounds the interaction of itinerant electrons with local magnetic moments generates quasiparticles with masses up to several 1000 electron masses. This may be accompanied by exciting properties, such as unconventional superconductivity in a magnetic environment, non-Fermi liquid behavior and quantum criticality. Strong electronic correlations are responsible for physical phenomena on a low energy scale. Consequently, these phenomena have to be studied at low temperatures. This, in turn, requires ultimate quality of single crystals to avoid that the low temperature intrinsic properties are covered by extrinsic effects due to off-stoichiometry, impurities or other crystal imperfections.

Keywords

stoichiometry --- growth --- crystal

Analysis of Hydrogen Bonds in Crystals

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ISBN: 9783038422457 9783038422464 Year: Pages: XIV, 308 DOI: 10.3390/books978-3-03842-246-4 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemistry (General)
Added to DOAB on : 2016-08-29 12:35:45
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There is no doubt that the hydrogen bond is one of the most-often analyzed interactions, and there is also no doubt that experimental studies, especially those based on the determination of crystal structures are very important since they deliver valuable information on the nature of this interaction, on different types of the hydrogen bonds, and also on reactions where a hydrogen bond may be treated as the preliminary step.Since the role of the analysis of crystal structures for investigations concerning hydrogen-bonded systems is valuable, the Editorial Board of Crystals, thus, decided to devote a Special Issue of the journal to the analysis of hydrogen bonds in crystals.

Crystal Dislocations: Their Impact on Physical Properties of Crystals

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ISBN: 9783038974659 9783038974666 Year: Pages: 316 DOI: 10.3390/books978-3-03897-466-6 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemistry (General) --- Analytical Chemistry
Added to DOAB on : 2019-01-09 12:11:05
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The proposed existence of the edge and screw dislocation in the 1930s, and the subsequent work showing that dislocation theory could explain the plastic deformation of crystals, represent an important step in developing our understanding of materials into a science. The continued work involved with characterization of dislocations and linking them to a variety of physical properties in both single and poly crystals have made enormous progress over the past 50 years. It is rare to find a technical application involving a material with any crystal structure that is not impacted by dislocations; mechanical properties, massive phase transformations, interphases, crystal growth, electronic properties, the list goes on. In many systems the properties is controlled by the formation of partial dislocations separated by a stacking fault; for example plastic deformation via deformation twinning. And finally, giant strides have been made in characterization and modeling of systems containing dislocations. The Special Issue on “Crystal Dislocations” is intended to provide a unique international forum aimed at covering a broad range of results involving dislocations and their importance on crystal properties and crystal growth. Scientists working in a wide range of disciplines are invited to contribute to this cause.Dr. K. Peter D. Lagerlof, Associate Professor of CeramicsGuest Editor

Numerische Untersuchung des Verformungs- und Bruchverhaltens von einkristallinem Wolfram auf mikroskopischer Ebene

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Book Series: Schriftenreihe des Instituts für Angewandte Materialien, Karlsruher Institut für Technologie ISSN: 21929963 ISBN: 9783731504443 Year: Volume: 52 Pages: XV, 184 p. DOI: 10.5445/KSP/1000049866 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:01
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The aim of the present work is to describe the deformation and fracture behavior of single crystal tungsten at the microscopic scale by using the ?nite element method. Therefore, the studies focus mainly on the in?uence of crystal orientation as well as the investigation of crack initiation and crack propagation. With a defined crack propagation model, the simulations of microbending allows for evaluating the details of the fracture process more accurately and supported the experimental studies.

The factorization method for inverse scattering from periodic inhomogeneous media

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ISBN: 9783866445505 Year: Pages: X, 152 p. DOI: 10.5445/KSP/1000019400 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Mathematics
Added to DOAB on : 2019-07-30 20:01:59
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This book addresses the identification of the shape of penetrable periodic media by means of scattered time-harmonic waves. Mathematically, this is about the determination of the support of a function which occurs in the governing equations. Our theoretical analysis shows that this problem can be strictly solved for acoustic as well as for electromagnetic radiation by the so-called Factorization Method. We apply this method to reconstruct a couple of media from numerically simulated field data.

Nucleation and Crystallization of Glasses and Glass-Ceramics

Authors: --- --- ---
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889452248 Year: Pages: 103 DOI: 10.3389/978-2-88945-224-8 Language: English
Publisher: Frontiers Media SA
Subject: General and Civil Engineering --- Materials
Added to DOAB on : 2017-10-13 14:57:01
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The E-book "Nucleation and Crystallization of Glasses and Glass-Ceramics" highlights historic perspectives and current research in the field of glass-ceramic technology. Glass-ceramic technology is promising to provide us with materials of high strength, high toughness, unique electrical/electronic or magnetic properties, exceptional optical or unusual thermal or chemical properties. The greater diversity of microstructure-property arrangements and processing routes over glasses and ceramics are responsible that glass-ceramics are the preferred choice of materials in many technical, consumer, optical, medical/dental, electrical/electronic, and architectural fields. This includes increasing uses of glass-ceramic materials for environment and energy applications in the last decades. The positive development of glass-ceramic technology has become true in particular due to the pioneering spirit, resourcefulness, and courage of researchers of the first generation. Extraordinary and, therefore, to be distinguished is the work of the glass-ceramic inventor S. Donald Stookey to whom this Research Topic is dedicated. The authors, all experts in the field of glass-ceramics and based in industry, academia and governmental institutions, contributed to this E-book under the guidance of the Technical Committee 07 "Crystallization and Glass-Ceramics" of the International Commission on Glass (ICG).

Polyhedral Structures, Symmetry, and Applications

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ISBN: 9783038426899 9783038426882 Year: Pages: 322 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Mathematics
Added to DOAB on : 2018-02-08 13:24:15
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Symmetry is an intriguing phenomenon manifesting itself in art, nature, and the mind. This Special Issue book features 19 articles about discrete geometric and combinatorial polyhedral structures, with symmetry as the unifying theme. These articles present an attractive mix of topics and have appeared in two related Special Issues of Symmetry, on "Polyhedra" in 2012/2013 and on "Polyhedral Structures" in 2016/2017. Specific topic areas covered include polyhedra, tilings, and crystallography; abstract polyhedra, maps on surfaces, and graphs; and polyhedral structures, arts, and architectural design.

Photonic crystal slabs for low-cost biosensors

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ISBN: 9783866445598 Year: Pages: VI, 165 p. DOI: 10.5445/KSP/1000019644 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:57
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Biosensors are devices that utilize biological recognition elements to selectively detect and analyze specific biological and chemical analyte substances. In this work a technology platform for label-free optical biosensors based on surface-functionalized photonic crystal slabs is proposed. Using this technology platform, low-cost solutions for three biotechnical questions are presented.

Slow-light photonic crystal devices for high-speed optical signal processing

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Book Series: Karlsruhe Series in Photonics & Communications / Universität Karlsruhe (TH), Institute of High-Frequency and Quantum Electronics (IHQ) ISSN: 18651100 ISBN: 9783866443136 Year: Volume: 4 Pages: X, 170 p. DOI: 10.5445/KSP/1000009905 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:57
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This book discusses design, modeling, and the characterization of slow-light photonic crystal waveguides. Guidelines are developed to obtain slow-light waveguides with broadband characteristics and with low disorder-induced losses. Three functional devices are proposed and studied: A tunable dispersion compensator, a tunable optical delay line, and a high-speed electro-optic modulator. Optical and microwave measurements confirm the designs.

Zur Lösemitteldiffusion in Polymernanoschichten: Schichtdicken- und Konzentrationsabhängigkeit

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ISBN: 9783731505914 Year: Pages: XVIII, 186 p. DOI: 10.5445/KSP/1000060263 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Chemical Engineering
Added to DOAB on : 2019-07-30 20:01:59
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Solution-casted polymer nanolayers are part of many technical applications. The solvent mass transport parameters are often unknown. However, they are a decisive factor for the determination of drying times, amounts of trace solvent, long-term stability and multilayer intermixing. By setting up a measurement system and conducting experimental and numerical investigations the difference in mass transport characteristics in micro- to nanoscale polymer layers is shown.

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