Download or read book Electronic Properties of Ionic Insulators and Semiconductor Superlattices by Pseudopotential and Molecular Dynamic density Functional Methods written by Robert Francis Gallup and published by . This book was released on 1990 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Semiconductor Superlattices written by Holger T. Grahn and published by World Scientific. This book was released on 1995 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book surveys semiconductor superlattices, in particular their growth and electronic properties in an applied electric field perpendicular to the layers. The main developments in this field, which were achieved in the last five to seven years, are summarized. The electronic properties include transport through minibands at low electric field strengths, the Wannier-Stark localization and Bloch oscillations at intermediate electric field strengths, resonant tunneling of electrons and holes between different subbands, and the formation of electric field domains for large carrier densities at high electric field strengths.
Download or read book Properties of Impurity States in Superlattice Semiconductors written by C.Y. Fong and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: A NATO workshop on "The Properties of Impurity States in Semiconductor Superlattices" was held at the University of Essex, Colchester, United Kingdom, from September 7 to 11, 1987. Doped semiconductor superlattices not only provide a unique opportunity for studying low dimensional electronic behavior, they can also be custom-designed to exhibit many other fascinating el~ctronic properties. The possibility of using these materials for new and novel devices has further induced many astonishing advances, especially in recent years. The purpose of this workshop was to review both advances in the state of the art and recent results in various areas of semiconductor superlattice research, including: (i) growth and characterization techniques, (ii) deep and shallow im purity states, (iii) quantum well states, and (iv) two-dimensional conduction and other novel electronic properties. This volume consists of all the papers presented at the workshop. Chapters 1-6 are concerned with growth and characterization techniques for superlattice semiconductors. The question of a-layer is also discussed in this section. Chapters 7-15 contain a discussion of various aspects of the impurity states. Chapters 16- 22 are devoted to quantum well states. Finally, two-dimensional conduction and other electronic properties are described in chapters 23-26.
Download or read book Commencement Ceremony written by University of California, Davis. Graduate Division and published by . This book was released on 1991 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Amorphous Insulators and Semiconductors written by M.F. Thorpe and published by Springer Science & Business Media. This book was released on 1997-01-31 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this NATO ASI has been to present an up-to-date overview of current areas of interest in amorphous materials. In order to limit the material to a manageable amount, the meeting was concerned exclusively with insulating and semiconducting materials. The lectures and seminars fill the gap between graduate courses and research seminars. The lecturers and seminar speakers were chosen as experts in their respective areas and the lectures and seminars that were given are presented in this volume. During the first week of the meeting. an emphasis was placed on introductory lectures, mainly associated with questions relating to the glass-formation and the structure of glasses. The second week focused more on research seminars. Each day of the meeting. about four posters were presented during the coffee breaks, and these formed an important focus for discussions. The posters are not reproduced in this volume as the editors wanted to have only larger contributions to make this volume more coherent. This volume is organized into four sections, starting with general considerations of the glass forming ability and techniques for the preparation of different kinds of glasses.
Download or read book Semiconductor Superlattices and Interfaces written by A. Stella and published by Elsevier. This book was released on 2013-10-22 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is concerned with the dynamic field of semiconductor microstructures and interfaces. Several topics in the fundamental properties of interfaces, superlattices and quantum wells are included, as are papers on growth techniques and applications. The papers deal with the interaction of theory, experiments and applications within the field, and the outstanding contributions are from both the academic and industrial worlds.
Download or read book Compound Semiconductor Strained Layer Superlattices written by R.M. Biefeld and published by Trans Tech Publications Ltd. This book was released on 1989-01-01 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: -Effect of Internal Piezoelectric Fields on the Electronic Structure and Optical Properties of Strained-Layer Superlattices -Metastability in Semiconductor Strained-Layer Structures -The Morphology of MOCVD-Grown Semiconductor Multilayers -Electrical Transport Studies of InGaAs/GaAs Strained-Layer Quantum-Well Structures -Device Structures Based on GaAsP/InGaAs Strained Layer Superlattices and Their Stability -The Preparation and Infrared Properties of In (AsSb) Strained-Layer Superlattices -Ion Implantation of III-V Compound Semiconductor Strained-Layer Semiconductors Systems -II-VI Strained-Layer Semiconductor Superlattices
Download or read book Electronic Properties of Semiconductor Superlattices Amorphous Semiconductors and Metal semiconductor Interfaces written by Lin Hung Yang and published by . This book was released on 1988 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theory of the Electronic and Structural Properties of Semiconductor Clusters written by Xiaodun Jing and published by . This book was released on 1995 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compound Semiconductor Strained layer Superlattices written by Robert M. Biefeld and published by . This book was released on 1989 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coverage includes: ion implantation; semiconductor characterization; and gallium arsenide.
Download or read book Physics Briefs written by and published by . This book was released on 1992 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Electronic Properties of Semiconductors Semiconductor simple Metal Interfaces and Transition Metal Alloys written by Jeffrey Steven Nelson and published by . This book was released on 1987 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electronic Properties of Multilayers and Low Dimensional Semiconductor Structures written by J.M. Chamberlain and published by Springer. This book was released on 1990 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focuses on several of the most active areas in modern semiconductor physics, including resonant tunnelling and superlattice phenomena and the topics of ballistic transport, quantized conductance, and anomalous magnetoresistance effects in laterally gated two-dimensional electron systems. Actual and potential applications of low dimensional structur.
Download or read book Structure and Electronic Properties of Amorphous Semiconductor Superlattices written by Tōkyō Daigaku. Institute for Solid State Physics and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Glassy Crystalline and Liquid Ionic Conductors written by Junko Habasaki and published by Springer. This book was released on 2018-06-23 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the physics of the dynamics of ions in various ionically conducting materials, and applications including electrical energy generation and storage. The experimental techniques for measurements and characterization, molecular dynamics simulations, the theories of ion dynamics, and applications are all addressed by the authors, who are experts in their fields. The experimental techniques of measurement and characterization of dynamics of ions in glassy, crystalline, and liquid ionic conductors are introduced with the dual purpose of introducing the reader to the experimental activities of the field, and preparing the reader to understand the physical quantities derived from experiments. These experimental techniques include calorimetry, conductivity relaxation, nuclear magnetic resonance, light scattering, neutron scattering, and others. Methods of molecular dynamics simulations are introduced to teach the reader to utilize the technique for practical applications to specific problems. The results elucidate the dynamics of ions on some issues that are not accessible by experiments. The properties of ion dynamics in glassy, crystalline and liquid ionic conductors brought forth by experiments and simulations are shown to be universal, i.e. independent of physical and chemical structure of the ionic conductor as long as ion-ion interaction is the dominant factor. Moreover these universal properties of ion dynamics are shown to be isomorphic to other complex interacting systems including the large class of glass-forming materials with or without ionic conductivity.By covering the basic concepts, theories/models, experimental techniques and data, molecular dynamics simulations, and relating them together, Dynamics of Glassy, Crystalline and Liquid Ionic Conductors will be of great interest to many in basic and applied research areas from the broad and diverse communities of condensed matter physicists, chemists, materials scientists and engineers. The book also provides the fundamentals for an introduction to the field and it is written in such a way that can be used for teaching courses either at the undergraduate or graduate level in academic institutions.
Download or read book Electronic Ionic Conduction Correlated Dielectric Relaxations in Molecular Solids written by Manesh Zachariah and published by . This book was released on 2017 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of crystalline materials has played a prominent role in solid state physics, whose basic theories were formulated for crystalline matter. However, disordered materials are more abundant in nature than crystalline ones, and, moreover, many practical applications use materials which are weakly or strongly disordered, such as molecular crystals, glasses, plastic crystals, liquids, polymers, or liquid crystals. In glasses, for example, the arrangement of the constituent atoms or molecules lacks any long-range order. From a fundamental viewpoint, we still lack an understanding of the properties of disordered materials and of the glass transition: understanding the many fascinating issues related with disorder requires in fact the use of concepts that are far from the well-known solid-state concepts associated with periodicity. From an applied perspective, the intense research in disordered solids is driven by the technological importance of these materials in daily life. From an electrical viewpoint, disordered solids can conduct electricity by transport of either electrons or ions. In the first case, disordered materials display lower electrical conductivity than their crystalline counterparts, due to localization of conduction electrons due to disorder, so that electron hopping is the main charge transport mechanism. On the other hand, the same disorder may allow the diffusion of ions through interstitial sites; the ionic conductivity of disordered materials is normally higher than the crystalline counterparts. This thesis presents an experimental study of the conduction properties and molecular dynamics of molecular solids made of fullerene derivatives (C60Br6, C60(ONa)24) and of dinitrile molecules such as succinonitrile (C2H4(CN)2) and glutaronitrile (C3H6(CN)2). The studied materials display, depending on the case, mainly electronic, protonic, or ionic conduction. The thesis provides insight into the different possible types of charge conduction in organic molecular materials and on related physical processes such as space-charge relaxations. In C60Br6 we observe n-type electronic conduction below room temperature and a non-trivial phase behavior. The temperature dependence of the dc conductivity of this organic semiconductor is in agreement with the variable-range hopping model. C60(ONa)24 has even richer phase behavior. It is synthesized as a polycrystalline hydrate, and can be obtained as pure material by heating to high temperature. We show that while the pure material is an n-type (electron) semiconductor, exposing it to humid atmosphere leads to a dramatic conductivity enhancement due to charge transport through the hydration layers, which is likely mediated by a proton exchange mechanism as in bulk water and ice. We also show that the dc conductivity of the hydrate is strongly temperature dependent across the dehydration process, and that both pure and hydrated forms display a conductivity-related dynamic process associated with accumulation of electrons at grain boundaries. The presence of water has strong impact on such frequency-dependent charge-accumulation dynamics. We finally analyze the relaxation dynamics and the ionic conductivity of plastic-crystalline ionic conductors, in particular the plastic cocrystals of succinonitrile with glutaronitrile. In plastic crystals, the molecules occupy lattice sites but undergo free rotational motions about their centers of mass. We find that succinonitrile-glutaronitrile cocrystals are the first ever known plastic crystals to display a perfect correlation between the ion drift and the on-site reorientational dynamics. Doping the cocrystals with Li salts boosts the conductivity but breaks down this perfect correlation. This indicates that the rotation-drift correlation is only valid when charge transport is dominated by self-diffusion of molecular (dinitrile) ions, and that it is a consequence of the correlation between rotational and diffusional time scales.
Download or read book Some Dynamic Electronic Properties of Semiconductor Surfaces and Interfaces microform written by Kallin, Catherine and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
