Computer Aided Innovation of New Materials II

Transport in Quantum Wires and Point Contacts: Numerical Study Institute for Solid State Physics, University of Tokyo, 7–22–1 Roppongi, Minato-ku, Tokyo 106, Japan A review is given of recent numerical studies of quantum transport ...

Author: M. Doyama

Publisher: Elsevier

ISBN: 9781483291475

Category: Computers

Page: 980

View: 808


With advanced materials being in the midst of a widely acknowledged revolution, there is relentless pressure on scientists and engineers to be on the cutting edge of emerging theories and design methodologies. The 379 papers in this two part volume bring together the experience of specialists in the entire field of applications of Materials Science. This multidisciplinary meeting was held to bring together workers in a wide range of materials science and engineering activities who employ common analytical and experimental methods in their day to day work. The results of the meeting are of worldwide interest, and will help to stimulate future research and analysis in this area.

Quantum Point Contacts and Quantum Wires

This series of Landolt-Börnstein volumes is summarizing our current knowledge of the phenomena of mesoscopic quantum systems with spatial extensions between those of atoms and ordinary macroscopic solids.

Author: B. Kramer

Publisher: Springer

ISBN: 3540617418

Category: Technology & Engineering

Page: 328

View: 922


This series of Landolt-Börnstein volumes is summarizing our current knowledge of the phenomena of mesoscopic quantum systems with spatial extensions between those of atoms and ordinary macroscopic solids. At low temperatures, they are said to become "quantum mechanically coherent" with states that extend over the whole system.

Mathematical Physics of Quantum Wires and Devices

... 178 pseudo-integrable system, 36 quantum dot open square, 92, 97 open stadium, 97 quantum Hall effect, 133, 153, 163 quantum leads, 92 quantum point contacts, 92 quantum wire circular bend, 71 deformed, 130 graphical model, ...

Author: N.E. Hurt

Publisher: Springer Science & Business Media

ISBN: 9789401596268

Category: Science

Page: 302

View: 457


This monograph on quantum wires and quantum devices is a companion vol ume to the author's Quantum Chaos and Mesoscopic Systems (Kluwer, Dordrecht, 1997). The goal of this work is to present to the reader the mathematical physics which has arisen in the study of these systems. The course which I have taken in this volume is to juxtapose the current work on the mathematical physics of quantum devices and the details behind the work so that the reader can gain an understanding of the physics, and where possible the open problems which re main in the development of a complete mathematical description of the devices. I have attempted to include sufficient background and references so that the reader can understand the limitations of the current methods and have direction to the original material for the research on the physics of these devices. As in the earlier volume, the monograph is a panoramic survey of the mathe matical physics of quantum wires and devices. Detailed proofs are kept to a min imum, with outlines of the principal steps and references to the primary sources as required. The survey is very broad to give a general development to a variety of problems in quantum devices, not a specialty volume.

Mesoscopic Electronics in Solid State Nanostructures

Quantum. Wires. and. Quantum. Point. Contacts. Quantum wires are quasi-one-dimensional systems, i.e. their width w must be comparable to the Fermi wavelength. In analogy to our previous notation in two dimensions, the wire is strictly ...

Author: Thomas Heinzel

Publisher: John Wiley & Sons

ISBN: 9783527618927

Category: Science

Page: 412

View: 886


This text treats electronic transport in the regime where conventional textbook models are no longer applicable, including the effect of electronic phase coherence, energy quantization and single-electron charging. This second edition is completely updated and expanded, and now comprises new chapters on spin electronics and quantum information processing, transport in inhomogeneous magnetic fields, organic/molecular electronics, and applications of field effect transistors. The book also provides an overview of semiconductor processing technologies and experimental techniques. With a number of examples and problems with solutions, this is an ideal introduction for students and beginning researchers in the field. "This book is a useful tool, too, for the experienced researcher to get a summary of recent developments in solid state nanostructures. I applaud the author for a marvellous contribution to the scientific community of mesoscopic electronics." Prof. K. Ensslin, Solid State Physics Laboratory, ETH Zurich

Nanoelectronic Device Applications Handbook

P. Jaksch, I. Yakimenko, and K.-F. Berggren, From quantum point contacts to quantum wires: Densityfunctional calculations with exchange and correlation effects, Phys. Rev. B 74, 235320, 2006. 7. K.J. Thomas et al., Possible spin ...

Author: James E. Morris

Publisher: CRC Press

ISBN: 9781466565241

Category: Technology & Engineering

Page: 940

View: 378


Nanoelectronic Device Applications Handbook gives a comprehensive snapshot of the state of the art in nanodevices for nanoelectronics applications. Combining breadth and depth, the book includes 68 chapters on topics that range from nano-scaled complementary metal–oxide–semiconductor (CMOS) devices through recent developments in nano capacitors and AlGaAs/GaAs devices. The contributors are world-renowned experts from academia and industry from around the globe. The handbook explores current research into potentially disruptive technologies for a post-CMOS world. These include: Nanoscale advances in current MOSFET/CMOS technology Nano capacitors for applications such as electronics packaging and humidity sensors Single electron transistors and other electron tunneling devices Quantum cellular automata and nanomagnetic logic Memristors as switching devices and for memory Graphene preparation, properties, and devices Carbon nanotubes (CNTs), both single CNT and random network Other CNT applications such as terahertz, sensors, interconnects, and capacitors Nano system architectures for reliability Nanowire device fabrication and applications Nanowire transistors Nanodevices for spintronics The book closes with a call for a new generation of simulation tools to handle nanoscale mechanisms in realistic nanodevice geometries. This timely handbook offers a wealth of insights into the application of nanoelectronics. It is an invaluable reference and source of ideas for anyone working in the rapidly expanding field of nanoelectronics.

Semiconductor Nanodevices

From quantum point contacts to quantum wires: density-functional calculations with exchange and correlation effects. Phys Rev B 2006;74(23):235320. [29] Berggren K-F, Yakimenko I. Effects of exchange and electron correlation on ...

Author: David Ritchie

Publisher: Elsevier

ISBN: 9780128220849

Category: Technology & Engineering

Page: 498

View: 192


Semiconductor Nanodevices: Physics, Technology and Applications opens with a section describing the fundamental technical and scientific background to the recent research covered in the subsequent chapters. This provides a suitable background for graduate students. This section covers firstly sample fabrication and characterization techniques. The growth techniques, primarily Molecular Beam epitaxy and Metal Organic Chemical Vapour Deposition are used for the growth of high purity epitaxial materials. There is also an emphasis on self-assembled growth of quantum dots and nanowires. This is followed by a description of device fabrication techniques commonly used including optical and e-beam lithography, along with etching (wet and dry) used for the fabrication of mesas as well as ohmic contacts and gate contacts etc. Next comes a description of structural characterisation techniques. Finally, low-temperature electrical and optical measurement techniques is described. Individual chapters review important recent advances in a range of different areas relating to semiconductor nanodevices. These include specific fabrication details for the structures described as well as a discussion of the physics accessible using these structures and devices. It is an important reference source for materials scientists and engineers who want to learn more about how semiconductor-based nanodevices are being used in a range of industry sectors. Explores the major industrial applications of semiconductor nanodevices Explains fabrication techniques for the production of semiconductor nanodevices Assesses the challenges for the mass production of semiconductor nanodevices

Contemporary Topics In Spintronics

... Charge rearrangement and screening in a quantum point contact, Phys. Rev. Lett. 98 (19), 196805 (May, 2007). K. Hirose, S.-S. Li, and N. S. Wingreen, Mechanisms for extra conductance plateaus in quantum wires, Phys. Rev.

Author: Bandyopadhyay Supriyo

Publisher: World Scientific

ISBN: 9789813149830

Category: Technology & Engineering

Page: 272

View: 283


The success of spintronics — the science and technology of storing, processing, sensing and communicating information using the quantum mechanical spin degree of freedom of an electron — is critically dependent on the ability to inject, detect and manipulate spins in semiconductors either by incorporating ferromagnetic materials into device architectures or by using external magnetic and electric fields. In spintronics, the controlled generation and manipulation of spin polarization in nonmagnetic semiconductors is required for the design of spin-sensitive devices ranging from spin-qubit hosts, quantum memory and gates, quantum teleporters, spin polarizers and filters, spin-field-effect-transistors, and spin-splitters, among others. One of the major challenges of spintronics is to control the creation, manipulation, and detection of spin polarized currents by purely electrical means. Another challenge is to preserve spin coherence in a device for the longest time or over the longest distance in order to produce reliable spintronic processors. These challenges remain daunting, but some progress has been made recently in overcoming some of the steepest obstacles. This book covers some of the recent advances in the field of spintronics using semiconductors.

Science and Technology of Mesoscopic Structures

The topics covers the ballistic conduction at quantum point contacts, conductance fluctuations in quantum wires, and the crossover of the quantum Hall effect from two dimension to one dimension. Introduction Recent developments in the ...

Author: Susumu Namba

Publisher: Springer Science & Business Media

ISBN: 9784431669227

Category: Science

Page: 469

View: 690


The International Symposium on the Science and Technology of Mesoscopic Structures was held at Shin-Kohkaido in Nara from November 6-8, 1991. The symposium was sponsored by the International Institute for Advanced Study and partly by Nara Prefecture, Nara City, Nara Convention Bureau, and the Ministry of Education, Science and Culture of Japan, as well as industrial organizations. We would like to acknowledge the support of the symposium by these or ganizations. The scope of the symposium was planned by the organizing committee to cover outstanding contributors in the fields of (1) ballistic transport, (2) electron wave guides and interference effects, (3) quantum confinement effects, (4) tunneling phenomena, (5) optical nonlinearity, and (6) fabrication technology of meso scopic structures. Twenty-six invited speakers were selected from the United States, Europe, and Japan. In addition twenty-four contributed papers were accepted for presentation at the poster session. These papers are included in the proceedings. We are grateful to the organizing committee, Ms. Y oshiko Kusaki of the Inter national Institute for Advanced Study for the secretarial service, and Dr. Nobuya Mori, Osaka University, for his scientific cooperation. Thanks are also due to the authors and the participants for their contributions to a successful symposium.

New Horizons in Low Dimensional Electron Systems

Introduction Recent developments in the technology of ultrafine lithography and crystal growth have enabled the fabrication of quantum point contacts and ultranarrow wires at semiconductor heterostructures. The size of such quantum ...

Author: H. Aoki

Publisher: Springer Science & Business Media

ISBN: 9789401131902

Category: Science

Page: 472

View: 169


In Bird of Passage by Rudolf Peierls, we find a paragraph in which he de scribes his Cambridge days in the 1930s: On these [relativistic field theory] problems my main contacts were Dirac, and the younger theoreticians. These included in particular Nevill (now Sir Nevill) Mott, perhaps the friendliest among many kind and friendly people we met then. Professor Kamimura became associated with Sir Rudolf Peierls in the 1950s, when he translated, with his colleagues, Peierls's 1955 textbook, Quantum Theory of Solids, into Japanese. This edition, to which Sir Rudolf himself contributed a preface, benefitted early generations of Japanese solid state physicists. Later in 1974/5, during a sabbatical year spent at the Cavendish Laboratory, Professor Kamimura met and began a long association with Sir Nevill Mott. In particular, they developed ideas for disordered systems. One of the outcomes is a paper coauthored by them on ESR-induced variable range hopping in doped semiconductors. A series of works on disordered systems, together with those on two-dimensional systems, have served as building blocks for Physics of Interacting Electrons in Disordered Systems, in the International Series of Monographs on Physics, coauthored by Aoki and published in 1989 by the Oxford University Press. Soon after Professor Kamimura obtained a D. Sc. in 1959 for the work on the ligand field theory under the supervision ofMasao Kotani, his strong con nections in the international physical community began when he worked at the Bell Telephone Laboratories in 1961/64.

Transport Phenomena in Mesoscopic Systems

INTRODUCTION Owing to the recent developments in microfabrication technology, artificial structures as small as a few hundreds angstrom can be fabricated such as metallic wires, quantum wires, dots, and point contacts.

Author: Hidetoshi Fukuyama

Publisher: Springer Science & Business Media

ISBN: 9783642848186

Category: Technology & Engineering

Page: 283

View: 469


This volume contains the proceedings of the Fourteenth Thniguchi Symposium on the Theory of Condensed Matter, which was held from November 10 to 14, 1991, at the Shima Kanko Hotel, Shima, Japan. The topic of the symposium was Physics 0/ Mesoscopic Systems. Mesoscopic systems have been developed band in band with the recent progress in nanotechnology and are the melting pot of basic science and technology. In nanostructures, the quantum effect of the electron wave manifests itself because of the limited dimensionality of the structure. The most typical features of these structures are the discreteness of the energy spectrum and the interference effect of electron waves, which have led to various fascinating phenomena. The purpose of this symposium was to discuss the latest developments in mesoscopic systems, especially transport phenomena, from the viewpoint of basic physics. This volume starts with an introduction to the field of mesoscopic systems together with the paper by Prof. R. Kubo, who was the first to note the existence of particular features of discrete energy levels in small metallic particles. In Part II the electronic states of quantum dots and the conductance through them are discussed. Tunneling via small structures and junctions is studied in Part ill.