Download or read book Electronic Transport in Two dimensional Systems in the Quantum Hall Regime written by Vinicio Tarquini and published by . This book was released on 2016 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Moreover, probing the breakdown via inner and outer edges reveals a breakdown in discontinuous steps characterized by exactly the Landau level spacing. These results are the first-time evidence for a resonant quantum tunneling mechanism realized through aligning the edge and bulk energy levels. We also explored the fundamental physics of graphene-based devices with an eye focused on possible applications as ultra-high gain and quantum efficiency hybrid graphene-quantum dots phototransistors. We have confirmed that natural graphene presents better transport properties as mobility (10-fold higher) and delta point closer to zero. Also we have been able to observe the anomalous quantum Hall effect, unique to graphene, symbol of the high quality of the device. More experimental work is needed to gain more insights on the real efficiency of the devices and a more efficient fabrication.
Download or read book Low Dimensional Systems written by Tobias Brandes and published by Springer. This book was released on 2008-01-11 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental progress over the past few years has made it possible to test a n- ber of fundamental physical concepts related to the motion of electrons in low dimensions. The production and experimental control of novel structures with typical sizes in the sub-micrometer regime has now become possible. In parti- lar, semiconductors are widely used in order to con?ne the motion of electrons in two-dimensional heterostructures. The quantum Hall e?ect was one of the ?rst highlights of the new physics that is revealed by this con?nement. In a further step of the technological development in semiconductor-heterostructures, other arti?cial devices such as quasi one-dimensional ‘quantum wires’ and ‘quantum dots’ (arti?cial atoms) have also been produced. These structures again di?er very markedly from three- and two-dimensional systems, especially in relation to the transport of electrons and the interaction with light. Although the technol- ical advances and the experimental skills connected with these new structures are progressing extremely fast, our theoretical understanding of the physical e?ects (such as the quantum Hall e?ect) is still at a very rudimentary level. In low-dimensional structures, the interaction of electrons with one another and with other degrees of freedoms such as lattice vibrations or light gives rise to new phenomena that are very di?erent from those familiar in the bulk ma- rial. The theoretical formulation of the electronic transport properties of small devices may be considered well-established, provided interaction processes are neglected.
Download or read book Electronic Quantum Transport in Mesoscopic Semiconductor Structures written by Thomas Ihn and published by Springer. This book was released on 2004-09-09 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Opening with a brief historical account of electron transport from Ohm's law through transport in semiconductor nanostructures, this book discusses topics related to electronic quantum transport. The book is written for graduate students and researchers in the field of mesoscopic semiconductors or in semiconductor nanostructures. Highlights include review of the cryogenic scanning probe techniques applied to semiconductor nanostructures.
Download or read book Spin and Charge Ordering in the Quantum Hall Regime written by Benedikt Frieß and published by Springer. This book was released on 2016-06-24 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents a comprehensive yet concise introduction to the physics of two-dimensional electron systems in the quantum Hall regime, as well as an up-to-date overview of the current fields of research concerning the integer and fractional quantum Hall effect. The physics of two-dimensional electron systems at low temperatures and high magnetic fields are governed by the formation of discrete energy levels referred to as Landau levels. These narrow energy bands not only form the basis of the well-known quantum Hall effect but also promote strong interactions between the electrons, giving rise to some of the finest manifestations of many-body physics in solid state science. Examples include skyrmionic spin textures, ferromagnetic spin transitions, stripe and bubble phases, as well as fractional quantum Hall states with potential non-abelian exchange statistics. The thesis succeeds in profoundly deepening our understanding of these exotic states of matter, with a main focus on the density-modulated phases in the quantum Hall regime. These phases arise from the interplay of competing interactions and are characterized by a self-organized ordering of electrons in spatial patterns. Similar phases of matter are currently being studied in other material systems as well, most notably in high-temperature superconductors. The thesis stands out not only in terms of its contribution to improving readers’ grasp of physics, but also in the diversity and novelty of the measurement techniques employed, which take advantage of the interaction between the electrons and the surrounding crystal lattice.
Download or read book Low Dimensional Electronic Systems written by Guenther Neubauer and published by Springer Science & Business Media. This book was released on 2013-03-13 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: Owing to new physical, technological, and device concepts of low-dimensionalelectronic systems, the physics and fabrication of quasi-zero, one- and two-dimensional systems are rapidly growing fields. The contributions presented in this volume cover results of nanostructure fabrication including recently developed techniques, for example, tunneling probe techniques and molecular beam epitaxy, quantum transport including the integer and fractional quantum Hall effect, optical and transport studies of the two-dimensional Wigner solid, phonon studies of low-dimensional systems, and Si/SiGe heterostructures and superlattices. To the readers new in the field this volume gives a comprehensive introduction and for the experts it is an update of their knowledge and a great help for decisions about future research activities.
Download or read book Quantum Transport in Two dimensional Electron System 1 Transition Dynamics in the Electrical Breakdown of the Integer Quantum Hall Effect 2 Disorder Induced Scattering in Chemical Vapor Deposited Graphene written by 李明洋 and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Two dimensional Strongly Correlated Electronic Systems written by China Center of Advanced Science and Technology and published by Routledge. This book was released on 1989 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses present problems and looks towards the future development of new ideas in the field. The series of lectures places emphasis on the theoretical development of high Tc superconducting oxide materials. Contributions include an introduction to strongly correlated systems, the basic concepts of the Mott insulator, the fractional quantum Hall effect and a review of the current thoughts on resonating valence bonds. Research techniques such as variational Monte Carlo methods, mean field theories and topological excitations are also covered. The book will be of general interest and value to graduate students and researchers involved in the study of condensed matter theory.
Download or read book Balance Equation Approach to Electron Transport In Semiconductors written by Xiaolin Lei and published by World Scientific. This book was released on 2008 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a systematic, comprehensive and up-to-date description of the physical basis of the balance equation transport theory and its applications in bulk and low-dimensional semiconductors. The different aspects of the balance equation method, originally proposed by C S Ting and the author of the present book, were reviewed in the volume entitled Physics of Hot Electron Transport in Semiconductors (edited by C S Ting, World Scientific, 1992). Since then, this method has been extensively developed and applied to various new fields, such as transport in nonparabolic systems, spatially nonuniform systems and semiconductor devices, miniband conduction of superlattices, hot-electron magnetotransport, effects of impact ionization in transport, microwave-induced magnetoresistance oscillation, radiation-driven transport and electron cooling, etc. Due to its simplicity and effectiveness, the balance equation approach has become a useful tool to tackle the many transport phenomena in semiconductors, and provides a reliable basis for developing theories, modeling devices and explaining experiments.The book may be used as a textbook by graduate students. It will also benefit researchers in the field by helping them grasp the basic principles and techniques of the method, without having to spend a lot of time digging out the information from widespread literature covering a period of 30 years.
Download or read book Low Dimensional Electronic Systems written by A. Neubauer and published by Springer. This book was released on 1992-12-10 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Owing to new physical, technological, and device concepts of low-dimensionalelectronic systems, the physics and fabrication of quasi-zero, one- and two-dimensional systems are rapidly growing fields. The contributions presented in this volume cover results of nanostructure fabrication including recently developed techniques, for example, tunneling probe techniques and molecular beam epitaxy, quantum transport including the integer and fractional quantum Hall effect, optical and transport studies of the two-dimensional Wigner solid, phonon studies of low-dimensional systems, and Si/SiGe heterostructures and superlattices. To the readers new in the field this volume gives a comprehensive introduction and for the experts it is an update of their knowledge and a great help for decisions about future research activities.
Download or read book Electronic Transport in Mesoscopic Systems written by Supriyo Datta and published by Cambridge University Press. This book was released on 1997-05-15 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in semiconductor technology have made possible the fabrication of structures whose dimensions are much smaller than the mean free path of an electron. This book gives a thorough account of the theory of electronic transport in such mesoscopic systems. After an initial chapter covering fundamental concepts, the transmission function formalism is presented, and used to describe three key topics in mesoscopic physics: the quantum Hall effect; localisation; and double-barrier tunnelling. Other sections include a discussion of optical analogies to mesoscopic phenomena, and the book concludes with a description of the non-equilibrium Green's function formalism and its relation to the transmission formalism. Complete with problems and solutions, the book will be of great interest to graduate students of mesoscopic physics and nanoelectronic device engineering, as well as to established researchers in these fields.
Download or read book Proceedings of the International Conference on Electronic Properties of Two Dimensional Systems 10th Held in Newport Rhode Island on 31 May 4 June 1993 written by BROWN UNIV PROVIDENCE RI. and published by . This book was released on 1994 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: The selection process is difficult and fraught with potential for error, but I believe that the papers contained in these proceedings constitute a representative cross section of the recent work in this field, and contain among them some of the best recent work. As has been the case in previous conferences the focus of EP2DS-10 was the fundamental physics and phenomena related to electronic excitations in systems exhibiting dimensionality less than three. In spite of the specificity and limited dimensionality of the conference title, a large fraction of the papers presented was concerned with dimensionality less than two, consistent with the trends of the past few conferences. Approximately 30% of the papers presented were concerned with electronic phenomena associated with one and zero dimensions, reflecting the general directions of this field. A large number of papers again were concerned with the quantum Hall effect, the fractional quantum Hall effect and the regime of electron densities, temperatures and magnetic fields associated with the Wigner crystal. A large fraction of the meeting was also devoted to quantum wires and dots and to mesoscopic phenomena, including chaotic motion of carriers in laterally patterned nanostructures. There was a special invited symposium featuring studies of few-electron transport in lateral nano-structures, and a focused session on low-dimensional organic crystals, a new topic for this series.
Download or read book Perspectives in Quantum Hall Effects written by Sankar Das Sarma and published by Wiley-VCH. This book was released on 2008-07-11 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discovery of the quantized and fractional Quantum Hall Effect phenomena is among the most important physics findings in the latter half of this century. The precise quantization of the electrical resistance involved in the quantized Hall effect phenomena has led to the new definition of the resistance standard and has metrologically affected all of science and technology. This resource consists of contributions from the top researchers in the field who present recent experimental and theoretical developments. Each chapter is self-contained and includes its own set of references guiding readers to original papers and further reading on the topic.
Download or read book Proceedings of the International Conference 10th on Electronic Properties of Two Dimensional Systems Held at Newport Rhode Island on 31 May 4 June 1993 written by and published by . This book was released on 1993 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: As has been the case in previous conferences the focus of EP2DS-10 was tne fundamental physics and phenomena related to electronic excitations in systems exhibiting dimensionality less than three. In spite of the specificity and limited dimensionality of the conference title, a large fraction of the papers presented was concerned with dimensionality less than two, consistent with the trends of the past few conferences. Approximately 30% of the papers presented were concerned with electronic phenomena associated with one and zero dimensions, reflecting the general directions of this field. A large number of papers again were concerned with the quantum Hall effect, the fractional quantum Hall effect and the regime of electron densities, temperatures and magnetic fields associated with the Wigner crystal. A large fraction of the meeting was also devoted to quantum wires and dots and to mesoscopic phenomena, including chaotic motion of carriers in laterally patterned nanostructures. There was a special invited symposium featuring studies of few-electron transport in lateral nano- structures, and a focused session on low-dimensional organic crystals, a new topic for this series.
Download or read book High Magnetic Fields In Semiconductor Physics Proceedings Of The 16th International Conference written by Yong-jie Wang and published by World Scientific. This book was released on 2005-05-03 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive volume covers the latest research on high magnetic fields in semiconductor physics presented at the 16th International Conference (SemiMag 16), held in Tallahassee, Florida, August 2-8, 2004.The book features papers from more than 130 participants including the work of the foremost experts in the fields.Much of the most cutting-edge research is covered by the contributions as well as a special focused session on the recently discovered microwave-induced zero resistance effect.
Download or read book High Magnetic Fields written by Claude Berthier and published by Springer. This book was released on 2008-01-11 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is addressed to all scientists interested in the use of high magnetic ?elds and in the use of high-?eld facilities around the world. In particular it will help young scientists and newcomers to the topic to gain a better understanding in areas such as condensed matter physics, in which the magnetic ?eld plays a key role either as a parameter controlling the Hamiltonian, or as an experimental tool to probe the underlying mechanism. This concerns mostly strongly correlated and (or) low dimensional systems. Rather than covering all these subjects in detail, the philosophy here is to give essential physical concepts in some of the most active ?elds, which have been quickly growing in the last ten to twenty years. Besides its role as a physical parameter in condensed matter physics, a large magnetic ?eld is essential to Electron Paramagentic Resonance (EPR) and Nuclear Magnetic Resonance (NMR) spectroscopies. The state of art of high resolution NMRin liquids and solids and high frequency EPRapplied to ?elds like chemistry and biology are also reviewed in this volume. The ?rst series of chapters is devoted to the integer and the Fractional Qu- tum Hall E?ects (FQHE) in two-dimensional electron systems. C. Glattli brushes an historical background and a comprehensive review of transport phenomena in these systems, including recent developments on the mesoscopic electronic transport at the edges of quantum Hall samples, chiral Luttinger liquids and fractional excitations. R.
Download or read book Two Dimensional Systems Physics and New Devices written by Günther Bauer and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the series of International Winter Schools on New Developments in Solid State Physics, the fourth one was devoted to the subject: "Two Dimensional Systems: Physics and Devices". For the second time the pro ceedings of one of these Winter Schools appear as a volume in the Springer Series in Solid-State Sciences (the earlier proceedings were published as Vol. 53). The school was held in the castle of MauterndorfjSalzburg (Austria) February 24-28, 1986. These proceedings contain contributions ba:sed on the thirty invited lectures. The school was attended by 179 registered participants (40% students), who came from western European countries, the United States of America, Japan, the People's Republic of China and Poland. As far as the subjects are conterned, several papers deal with the growth and characterization of heterostructures. Dynamical RHEED tech niques are described as a tool for in situ studies of MBE growth mech anisms. Various growth techniques, including MBE, MOMBE, MOCVD and modifications of these, are discussed. The limiting fa.ctors for the carrier mobilities and the inftuence of the spacer thickness in single het erostructures of GaAs/GaAIAs seem to be understood and are no longer a matter of controversy. In addition, the growth of two fascinating systems, Si/SiGe and Hg _ Cd Te/CdTe, is discussed in detail
Download or read book Two Dimensional Electron Systems written by E.Y. Andrei and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent studies on two-dimensional systems have led to new insights into the fascinating interplay between physical properties and dimensionality. Many of these ideas have emerged from work on electrons bound to the surface of a weakly polarizable substrate such as liquid helium or solid hydrogen. The research on this subject continues to be at the forefront of modern condensed matter physics because of its fundamental simplicity as well as its connection to technologically useful devices. This book is the first comprehensive overview of experimental and theoretical research in this exciting field. It is intended to provide a coherent introduction for graduate students and non-experts, while at the same time serving as a reference source for active researchers in the field. The chapters are written by individuals who made significant contributions and cover a variety of specialized topics. These include the origin of the surface states, tunneling and magneto-tunneling out of these states, the phase diagram, collective excitations, transport and magneto-transport.
