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Author : E. E. Mendez
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (227 download)
Download or read book High-Magnetic-Field Transport in a Dilute Two-Dimensional Electron Gas written by E. E. Mendez and published by . This book was released on 1983 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Girish Bohra
Publisher :
ISBN 13 :
Total Pages : 59 pages
Book Rating : 4.:/5 (631 download)
Download or read book Magnetotransport Study of a High Mobility Two-dimensional Electron Gas written by Girish Bohra and published by . This book was released on 2009 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is focused on an experimental study of the electrical properties of a two-dimensional electron gas formed in a GaAs/AlGaAs heterostructure. Low temperature magneto-transport measurements are used to characterize the carrier density and mobility of this system. An extensive study of the temperature and current dependence of quantum-mechanical transport effects, observable at very low temperatures, is performed in the temperature range of 4.2-100 K, for measurement currents in the range of 10 nA- 100℗æA. The well-known decrease in the amplitude of the Shubnikov-de Haas effect, and an accompanying increase in the onset magnetic field of these oscillations, with increasing temperature, as well as a simultaneous suppression of the quantum-Hall effect, is observed. Similar behavior is found on increasing the measurement current. An analysis of the insulator to quantum Hall transition (I-QH), occurring in the two-dimensional electron gas at low perpendicular magnetic fields, is also reported, along with the results of investigations of electron heating based on the measurements of the energy-loss rate. This study shows that the direct I-QH transition does not always correspond to the onset of strong localization, with clear Shubnikov-de Haas oscillations being observed in the insulating regime. A linear dependence of the electron energy-loss rate and electron temperature in the temperature range of 4.2-40 K is determined, indicating that the main mechanism for electron energy relaxation is acoustic phonon scattering.
Author : Hidetoshi Fukuyama
Publisher :
ISBN 13 :
Total Pages : 33 pages
Book Rating : 4.:/5 (246 download)
Download or read book The Two-dimensional Electron Gas in a Strong Magnetic Field written by Hidetoshi Fukuyama and published by . This book was released on 1977 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gottfried Landwehr
Publisher : Springer Science & Business Media
ISBN 13 : 3642844081
Total Pages : 699 pages
Book Rating : 4.6/5 (428 download)
Download or read book High Magnetic Fields in Semiconductor Physics III written by Gottfried Landwehr and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: High magnetic fields have, for a long time, been an important tool in the investigation of the electronic structure of semiconductors. In recent yearsstudies of heterostructures and superlattices have predominated, and this emphasis is reflected in these proceedings. The contributions concentrate on experiments using transport and optical methods, but recent theoretical developments are also covered. Special attention is paid to the quantum Hall effect, including the problem of edge currents, the influence of contacts, and Wigner condensation in the fractional quantum Hall effect regime. The 27 invited contributions by renowned expertsprovide an excellent survey of the field that is complemented by numerous contributed papers.
Author : Jainendra K. Jain
Publisher : Cambridge University Press
ISBN 13 : 1139462644
Total Pages : 561 pages
Book Rating : 4.1/5 (394 download)
Download or read book Composite Fermions written by Jainendra K. Jain and published by Cambridge University Press. This book was released on 2007-03-29 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was first published in 2007. When electrons are confined to two dimensions, cooled to near absolute zero temperature, and subjected to a strong magnetic field, they form an exotic new collective state of matter. Investigations into this began with the observations of integral and fractional quantum Hall effects, which are among the most important discoveries in condensed matter physics. The fractional quantum Hall effect and a stream of other unexpected findings are explained by a new class of particles: composite fermions. This textbook is a self-contained, pedagogical introduction to the physics and experimental manifestations of composite fermions. Ideal for graduate students and academic researchers, it contains numerous exercises to reinforce the concepts presented. The topics covered include the integral and fractional quantum Hall effects, the composite-fermion Fermi sea, various kinds of excitations, the role of spin, edge state transport, electron solid, bilayer physics, fractional braiding statistics and fractional local charge.
Author : Quoc M. Doan
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (235 download)
Download or read book Variational Study of the Nematic State of the Two Dimensional Electron Gas in a Magnetic Field written by Quoc M. Doan and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: We have studied the nematic state of the two dimensional electron gas (2DEG) at halffilled Landau level (LL). Our motivation comes from experiments in which anisotropic transport in the 2DEG under high magnetic field and at low temperature was observed. Based on a model of the nematic state proposed by Oganesyan, Fradkin and Kivelson, we investigate this state and compare it with other competing states proposed by other groups. First, we investigate at what LL the nematic state becomes energetically favorable as compared to the isotropic state. Our studies indicate that this occurs at the second excited LL. Moreover, we compare the energy of the nematic state with that of the stripe state obtained within the Hartree-Fock approximation (HF) and we conclude that, for the samples studied experimentally, the nematic state might be more stable. In our study we have used two different methods which both have advantages and disadvantages.
Author : United States. Army Research Office
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.3/5 (91 download)
Download or read book Research in Progress written by United States. Army Research Office and published by . This book was released on 1984 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1977- consist of two parts: Chemistry, biological sciences, engineering sciences, metallurgy and materials science (issued in the spring); and Physics, electronics, mathematics, geosciences (issued in the fall).
Author :
Publisher :
ISBN 13 :
Total Pages : 644 pages
Book Rating : 4.:/5 (39 download)
Download or read book Research in Progress written by and published by . This book was released on 1983 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. A. Brummell
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (593 download)
Download or read book High Magnetic Field Studies of the Two-dimensional Electron Gas Formed in Semiconductor Heterostructures written by M. A. Brummell and published by . This book was released on 1985 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Masahiro Hara
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (249 download)
Download or read book Transport in Two-dimensional Electron Gas with Isolated Magnetic Barriers written by Masahiro Hara and published by . This book was released on 2002 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : E.Y. Andrei
Publisher : Springer Science & Business Media
ISBN 13 : 9401512868
Total Pages : 398 pages
Book Rating : 4.4/5 (15 download)
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.
Author : Seung-Joo Lee
Publisher :
ISBN 13 :
Total Pages : 162 pages
Book Rating : 4.:/5 (851 download)
Download or read book Study of a Two-dimensional Electron Gas in a Magnetic Field written by Seung-Joo Lee and published by . This book was released on 1981 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. Ploog
Publisher : Springer Science & Business Media
ISBN 13 : 3642695809
Total Pages : 221 pages
Book Rating : 4.6/5 (426 download)
Download or read book Molecular Beam Epitaxy of III–V Compounds written by K. Ploog and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: Epitaxial growth and electronic properties of semiconductor thin films are becoming increasingly important for fundamental and applied research and for device applications. This book contains a comprehensive collection of over 1500 references covering the first 25 years of molecular beam epitaxy of III-V compound semiconductors. Molecular beam epitaxy is a versatile thin film growth technique which emerged from the 'Three-temperature method' de veloped in the 1950s and from surface kinetic studies performed in the 1960s. III-V semiconductors such as GaAs, AlAs, (Galn)As, InP, etc., play an important role in the application to optoelectronic and high-speed devices. Over the past three years the technology of molecular beam epitaxy has spread rapidly to most major research and development laboratories through out the world, and an increasing number of highly refined III-V semiconduc tor structures with exactly tailored electronic properties have been pro duced and explored for fundamental studies as well as for device appl ica tion. The comprehensive bibliography on this dramatically expanding topic helps chemists, engineers, materials scientists, and physicists working in semiconductor research and development areas to sort out the important lit erature of their particular interest. A direct reproduction of the output of a computer printer has been used to enable rapid publication and to keep printing costs low. The work was sponsored by the 'Bundesministerium fUr Forschung und Technologie' of the Federal Republic of Germany. Stuttgart, January 1984 K. Ploog . K. Graf Subject Categories and References Introduction ... Year 1977 ...
Author : Giorgio Margaritondo
Publisher : Springer Science & Business Media
ISBN 13 : 9400930739
Total Pages : 348 pages
Book Rating : 4.4/5 (9 download)
Download or read book Electronic Structure of Semiconductor Heterojunctions written by Giorgio Margaritondo and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: E se non che di cid son vere prove A nd were it not for the true evidence Per piti e piti autori, che sa, ra. nno Of many authors who will be Per i miei versi nominati altrove, Mentioned elsewhere in my rhyme Non presterei alla penna 10. mana I would not lend my hand to the pen Per nota1' cid ch'io vidi, can temenza And describe my observations, for fear ehe non fosse do. altri casso e van 0; That they would be rejected and in vane; Mala lor chiara. e vera. esperienza But these authors' clear and true experience Mi assicura. nel dir, come persone Encourages me to report, since they Degne di fede ad ogni gra. n sentenza. Should always be trusted for their word. [From" Dittamondo", by Fazio degli UbertiJ Heterojunction interfaces, the interfaces between different semiconducting materi als, have been extensively explored for over a quarter of a century. The justifica tion for this effort is clear - these interfaces could become the building blocks of lllany novel solid-state devices. Other interfaces involving semiconductors are al ready widely used in technology, These are, for example, metal-semiconductor and insulator-semiconductor junctions and hOll1ojunctions. In comparison, the present applications of heterojunction int. erfaces are limited, but they could potentially becOlne lnuch lllore ext. ensive in the neal' future. The path towards the widespread use of heterojunctions is obstructed by several obstacles
Author : Marcin z Drozdowa Byszewski
Publisher :
ISBN 13 :
Total Pages : 143 pages
Book Rating : 4.:/5 (491 download)
Download or read book Optical Properties of a Two-dimensional Electron Gas in Magnetic Fields written by Marcin z Drozdowa Byszewski and published by . This book was released on 2005 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of properties of a two-dimensional electron gas in magnetic fields by optical spectroscopy is presented: fractional quantum Hall effect (FQHE) studied by photoluminescence and inelastic light scattering in high fields, and a recently discovered effect of microwave induced resistance oscillations (MIROs) by transport and absorption measurements in low fields. Until now, series of FQHE states, arising due to electron interaction, were not observed in photoluminescence. This work reports on optical detection of a whole family of 1/2 fractional states observed in photoluminescence. The features reflect pattern analogous to the one observed by the magneto--resistivity traces. The strongest features observed even in raw data include fractions 1/3, 2/5, 3/7, 3/5, 2/3 , and 1 on either side of the 1/2 state. The last chapter describes the studies of the new effect of microwave resistance induced oscillations (MIROs). When irradiated with microwaves, the behaviour of 2DEG transport properties deviates from the Shubnikov -- de Haas oscillations. The resistance traces exhibit series of vanishing resistance states. The frequency dependence of transport data shows a gradual changeover from transport traces reflecting MIROs in low microwave frequencies, to traces showing nearly the cyclotron resonance only. The results of the absorption measurements validate description of the MIROs as the result of oscillatory density of states. Also, the existence of two separate absorption processes are suggested to explain the microwave polarisation independence of MIROs, and the crossover from MIROs-like transport data at low frequencies to cyclotron--like traces at higher frequencies.
Author : Tadashi Toyoda
Publisher :
ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.:/5 (74 download)
Download or read book Study of a Two-dimensional Electron Gas in a Weak Magnetic Field written by Tadashi Toyoda and published by . This book was released on 1978 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 840 pages
Book Rating : 4.3/5 (129 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
