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Phonon Exchange By Two Dimensional Electrons In Intermediate Magnetic Fields
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Book Synopsis Phonon Exchange by Two-dimensional Electrons in Intermediate Magnetic Fields by : Gokul Gopalakrishnan
Download or read book Phonon Exchange by Two-dimensional Electrons in Intermediate Magnetic Fields written by Gokul Gopalakrishnan and published by . This book was released on 2008 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The discovery of the integer and fractional quantum Hall effects have broadened the exploration of the two-dimensional electron gas to regimes where complex and exciting physics lay previously hidden. While many experimental investigations have focused on the regime of large magnetic fields where transport properties are determined by contributions from a single Landau level, the regime of intermediate fields, where multiple Landau levels are involved, has been much less explored. This dissertation is a report on a previously unobserved interaction probed by a novel type of magneto-transport measurement performed in this intermediate regime, in bilayer two-dimensional electron systems. This measurement technique, known as electron drag, directly measures interlayer electron-electron scattering rates, by measuring the voltage induced in one of the layers when a current is driven through the other. The scattering mechanism, which may be Coulomb or phonon mediated, depends critically on both the separation between the layers and the electron density. When electron drag is measured in the presence of a perpendicular magnetic field in suitable samples, the resulting magnetodrag signal reveals new information about the electronic states as well as properties of a phonon mediated scattering mechanism. This phonon scattering mechanism is reflected in previously unobserved oscillations. These oscillations, which are periodic in the inverse field, are argued to arise from a resonant interlayer exchange of $2k_F$ phonons. Measurements of the temperature, density and layer-spacing dependences of magnetodrag resistivity are reported and are shown to confirm this particular mechanism. Additionally, analysis of the temperature dependence reveals a strong sensitivity to Landau level widths. Based on this analysis, a means of characterizing the broadening of Landau levels and hence, electronic lifetimes in this regime, which are otherwise difficult to characterize, is proposed.
Book Synopsis Emerging Phenomena in Two-dimensional Electron System in Intermediate Magnetic Fields by : Sanghun An
Download or read book Emerging Phenomena in Two-dimensional Electron System in Intermediate Magnetic Fields written by Sanghun An and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The interlayer electron-electron interaction in bilayer two-dimensional electron system has been studied in tilted magnetic fields through electron drag measurements. In intermediate magnetic fields, where the temperature of electrons is comparable or larger than Landau level spacing, electrons near Fermi level can access more than one Landau level and inter-Landau level scatterings play an important role in transport properties of the system. In such a regime, we observed that the resonant 2k_F interlayer phonon exchange present in perpendicular magnetic fields is suppressed by moderate in-plane magnetic fields. Furthermore, in the absence of such resonant phonon exchange, the magneto-enhancement of drag is nearly temperature-independent and has a highly unusual B_perp^3 field dependence. We argue that the drastic suppression of 2k_F phonon exchange in tilted magnetic fields might be related to the substantial change in out-of-plane Lorentz force on electrons by in-plane component of fields during the 2k_F scattering process. We also argue that highly unusual temperature and field dependences of drag in tilted magnetic fields might be a consequence of fully-activated inter-Landau level scatterings, which are often neglected.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1971-05 with total page 1110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Similarity in Diversity by : D. L. Morabito
Download or read book Similarity in Diversity written by D. L. Morabito and published by Nova Publishers. This book was released on 2003 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together interdisciplinary topics in condensed matter theory and related disciplines, with an emphasis on the common concerns of (mostly) theorists applying advanced many-particle methods in diverse areas: solid state and low temperature physics; atomic, sub-atomic, and statistical physics; engineering sciences, keeping a sharp focus on theoretical developments which cross borders between subfields of condensed matter physics and which provide new approaches to outstanding problems. The book records the fascinating variety of new results associated with the idea of similarity in diversity. In perusing this volume, the reader will be stimulated to discern threads of similarity in the great diversity of physical phenomena and theoretical models proposed to explain them; and indeed there are threads that can be glimpsed in the table of contents, and ramifications of these threads as one reads through the articles. One conclusion is clear: the search for similarity in diversity is a powerful approach to interdisciplinary science.
Book Synopsis Electrons in Molecules by : Jean-Pierre Launay
Download or read book Electrons in Molecules written by Jean-Pierre Launay and published by Oxford University Press, USA. This book was released on 2014 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to provide the reader with essential keys to a unified understanding of the rapidly expanding field of molecular materials and devices: electronic structures and bonding, magnetic, electrical and photo-physical properties, and the mastering of electrons in molecular electronics. Chemists will discover how basic quantum concepts allow us to understand the relations between structures, electronic structures, and properties of molecular entities and assemblies, and to design new molecules and materials. Physicists and engineers will realize how the molecular world fits in with their need for systems flexible enough to check theories or provide original solutions to exciting new scientific and technological challenges. The non-specialist will find out how molecules behave in electronics at the most minute, sub-nanosize level. The comprehensive overview provided in this book is unique and will benefit undergraduate and graduate students in chemistry, materials science, and engineering, as well as researchers wanting a simple introduction to the world of molecular materials.
Book Synopsis Physics of Semiconductors in High Magnetic Fields by : Noboru Miura
Download or read book Physics of Semiconductors in High Magnetic Fields written by Noboru Miura and published by Oxford University Press. This book was released on 2008 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes most of the fundamental physical phenomena which semiconductors and their modulated structures exhibit in high magnetic fields. Readers can learn not only the basic theoretical background but also the present state of the art from the most advanced data in this rapidly growing research area.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis A Biweekly Cryogenics Current Awareness Service by :
Download or read book A Biweekly Cryogenics Current Awareness Service written by and published by . This book was released on 1980 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Bell Telephone Laboratories. Libraries and Information Systems Center Publisher : ISBN 13 : Total Pages :582 pages Book Rating :4.3/5 (91 download)
Book Synopsis Bell Laboratories Talks and Papers by : Bell Telephone Laboratories. Libraries and Information Systems Center
Download or read book Bell Laboratories Talks and Papers written by Bell Telephone Laboratories. Libraries and Information Systems Center and published by . This book was released on 1981 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Semiconductor Science and Technology by :
Download or read book Comprehensive Semiconductor Science and Technology written by and published by Newnes. This book was released on 2011-01-28 with total page 3572 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductors are at the heart of modern living. Almost everything we do, be it work, travel, communication, or entertainment, all depend on some feature of semiconductor technology. Comprehensive Semiconductor Science and Technology, Six Volume Set captures the breadth of this important field, and presents it in a single source to the large audience who study, make, and exploit semiconductors. Previous attempts at this achievement have been abbreviated, and have omitted important topics. Written and Edited by a truly international team of experts, this work delivers an objective yet cohesive global review of the semiconductor world. The work is divided into three sections. The first section is concerned with the fundamental physics of semiconductors, showing how the electronic features and the lattice dynamics change drastically when systems vary from bulk to a low-dimensional structure and further to a nanometer size. Throughout this section there is an emphasis on the full understanding of the underlying physics. The second section deals largely with the transformation of the conceptual framework of solid state physics into devices and systems which require the growth of extremely high purity, nearly defect-free bulk and epitaxial materials. The last section is devoted to exploitation of the knowledge described in the previous sections to highlight the spectrum of devices we see all around us. Provides a comprehensive global picture of the semiconductor world Each of the work's three sections presents a complete description of one aspect of the whole Written and Edited by a truly international team of experts
Download or read book Soviet Physics, Solid State written by and published by . This book was released on 1992 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Perovskite Light Emitting Diodes by : Hong Meng
Download or read book Perovskite Light Emitting Diodes written by Hong Meng and published by John Wiley & Sons. This book was released on 2024-01-03 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perovskite Light Emitting Diodes An introduction to revolutionary display technology Perovskite Light Emitting Diodes, commonly referred to as Pe-LEDs, leverage a perovskite nanocrystal core to engender a luminous and efficient diode, holding the potential to bring about a paradigm shift in the realm of display technology. In recent times, Pe-LEDs have garnered substantial industrial interest due to their intrinsic capability to exhibit a diverse array of colors with exceptional fidelity, their operation at low voltage thresholds, and their straightforward structural composition. The prospective implications for enabling cost-effective, heightened-performance flat-panel displays as well as flexible display solutions remain notably profound. Perovskite Light Emitting Diodes: Materials and Devices presents a comprehensive and insightful overview of these diodes and their multifaceted applications. Commencing with an incisive exploration of the historical trajectory of this technology, alongside a delineation of its foundational materials and intricate device architectures, this compendium provides a gateway into both contemporaneous state-of-the-art deployments and the vanguard of ongoing research endeavors directed towards charting future advancements. Perovskite Light Emitting Diodes readers will also find: Stability analysis for different Pe-LED devices, a key aspect of creating physical displays Authorship by an established expert in organic electronics Detailed discussion of perovskite preparation methods including ultrasonic, solvent heat, thermal injection, and many more Perovskite Light Emitting Diodes is ideal for materials scientists, electrical engineers, solid state chemists, solid state physicists, inorganic chemists, and any researchers or engineers working with display technology.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superconducting Materials by : Sadao Nakajima
Download or read book Superconducting Materials written by Sadao Nakajima and published by . This book was released on 1988 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Quantum Condensed Matter Physics by : Michael El-Batanouny
Download or read book Advanced Quantum Condensed Matter Physics written by Michael El-Batanouny and published by Cambridge University Press. This book was released on 2020-03-26 with total page 839 pages. Available in PDF, EPUB and Kindle. Book excerpt: Condensed matter physics has fast become the largest discipline within physics. Based on an established course, this comprehensive textbook covers one-body, many-body and topological perspectives. It is the first textbook that presents a comprehensive coverage of topological aspects of condensed matter as a distinct yet integrated component. It covers topological fundamentals and their connection to physics, introduces Berry phase and Chern numbers, describes general topological features of band structures and delineates its classification. Applications as manifest in the quantum Hall effect, topological insulators and Weyl semimetal are presented. Modern topics of current interest are explored in-depth, helping students prepare for cutting-edge research. These include one-electron band theory, path integrals and coherent states functional integrals as well as Green and Matsubara functions, spontaneous symmetry breaking, superfluidity and superconductivity. Multiple chapters covering quantum magnetism are also included. With end-of-chapter exercises throughout, it is ideal for graduate students studying advanced condensed matter physics.
Download or read book The Engineering Index Annual written by and published by . This book was released on 1993 with total page 2264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its creation in 1884, Engineering Index has covered virtually every major engineering innovation from around the world. It serves as the historical record of virtually every major engineering innovation of the 20th century. Recent content is a vital resource for current awareness, new production information, technological forecasting and competitive intelligence. The world?s most comprehensive interdisciplinary engineering database, Engineering Index contains over 10.7 million records. Each year, over 500,000 new abstracts are added from over 5,000 scholarly journals, trade magazines, and conference proceedings. Coverage spans over 175 engineering disciplines from over 80 countries. Updated weekly.
