Electron Nuclear Spin Dynamics In Semiconductor Nanostructures

Electron   Nuclear Spin Dynamics in Semiconductor Nanostructures PDF
Author: M. M. Glazov
Publisher: Series on Semiconductor Scienc
ISBN: 0198807309
Size: 32.18 MB
Format: PDF
Category : Science
Languages : en
Pages : 304
View: 2531

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In recent years, the physics community has experienced a revival of interest in spin effects in solid state systems. On one hand, the solid state systems, particularly, semiconductors and semiconductor nanosystems, allow us to perform benchtop studies of quantum and relativistic phenomena. On the other hand, this interest is supported by the prospects of realizing spin-based electronics, where the electron or nuclear spins may play a role of quantum or classical information carriers. This book looks in detail at the physics of interacting systems of electron and nuclear spins in semiconductors, with particular emphasis on low-dimensional structures. These two spin systems naturally appear in practically all widespread semiconductor compounds. The hyperfine interaction of the charge carriers and nuclear spins is particularly prominent in nanosystems due to the localization of the charge carriers, and gives rise to spin exchange between these two systems and a whole range of beautiful and complex physics of manybody and nonlinear systems. As a result, understanding of the intertwined spin systems of electrons and nuclei is crucial for in-depth studying and controlling the spin phenomena in semiconductors. The book addresses a number of the most prominent effects taking place in semiconductor nanosystems including hyperfine interaction, nuclear magnetic resonance, dynamical nuclear polarization, spin-Faraday and spin-Kerr effects, processes of electron spin decoherence and relaxation, effects of electron spin precession mode-locking and frequency focussing, as well as fluctuations of electron and nuclear spins.

Electron And Nuclear Spin Dynamics In Semiconductor Nanostructures

Electron and Nuclear Spin Dynamics in Semiconductor Nanostructures PDF
Author: Mikhail M. Glazov
Publisher:
ISBN: 9780191845093
Size: 74.89 MB
Format: PDF, ePub, Docs
Category : Nanostructures
Languages : en
Pages : 283
View: 7559

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This book focuses on the main aspects of electron and nuclear spin dynamics in semiconductor nanostructures. It summarizes main results of theoretical and experimental studies of interactions in spin systems, effects of ultrafast spin manipulation by light, phenomena of spin losses, and the physics of the omnipresent spin noise.

Electron Nuclear Spin Dynamics In Semiconductor Nanostructures

Electron   Nuclear Spin Dynamics in Semiconductor Nanostructures PDF
Author: M. M. Glazov
Publisher: Oxford University Press
ISBN: 0192534211
Size: 45.16 MB
Format: PDF, Docs
Category : Science
Languages : en
Pages : 320
View: 6314

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In recent years, the physics community has experienced a revival of interest in spin effects in solid state systems. On one hand, the solid state systems, particularly, semiconductors and semiconductor nanosystems, allow us to perform benchtop studies of quantum and relativistic phenomena. On the other hand, this interest is supported by the prospects of realizing spin-based electronics, where the electron or nuclear spins may play a role of quantum or classical information carriers. This book looks in detail at the physics of interacting systems of electron and nuclear spins in semiconductors, with particular emphasis on low-dimensional structures. These two spin systems naturally appear in practically all widespread semiconductor compounds. The hyperfine interaction of the charge carriers and nuclear spins is particularly prominent in nanosystems due to the localization of the charge carriers, and gives rise to spin exchange between these two systems and a whole range of beautiful and complex physics of manybody and nonlinear systems. As a result, understanding of the intertwined spin systems of electrons and nuclei is crucial for in-depth studying and controlling the spin phenomena in semiconductors. The book addresses a number of the most prominent effects taking place in semiconductor nanosystems including hyperfine interaction, nuclear magnetic resonance, dynamical nuclear polarization, spin-Faraday and spin-Kerr effects, processes of electron spin decoherence and relaxation, effects of electron spin precession mode-locking and frequency focussing, as well as fluctuations of electron and nuclear spins.

First Principles Hyperfine Tensors For Gaas And Si

First principles Hyperfine Tensors for GaAs and Si PDF
Author: Pericles Philippopoulos
Publisher:
ISBN:
Size: 25.62 MB
Format: PDF, ePub, Mobi
Category :
Languages : en
Pages :
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"An accurate description of the hyperfine interaction between electron spins and nuclear spins is crucial for understanding spin dynamics in semiconductor nanostructures. In this thesis, we study the hyperfine interactions in III-V semiconductors and Si. We use the Elk code to perform a density-functional-theory calculation of the contact hyperfine parameter for Si and the Ga and As sites in GaAs. Our result differs from the experimental values found with NMR by less than 3%, while the previous theoretical result differs from the same experimental values by more than 10%. To the best of our knowledge, the calculations in this thesis give the first theoretical estimate of the contact hyperfine coupling in GaAs derived from first principles. Additionally, we show how to go beyond usual methods to accurately determine hyperfine tensors in strongly spin-orbit coupled materials. We achieve this by combining density-functional theory and group theory, accounting for the full coupled spin-orbit structure of the associated single-particle states. Finally, we show how to verify the predicted electronic structure experimentally spectroscopically, by determining a set of allowed electric-dipole transitions." --

Bands And Photons In Iii V Semiconductor Quantum Structures

Bands and Photons in III V Semiconductor Quantum Structures PDF
Author: Igor Vurgaftman
Publisher: Oxford University Press, USA
ISBN: 0198767277
Size: 62.96 MB
Format: PDF, ePub, Mobi
Category : Science
Languages : en
Pages : 688
View: 4323

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This book takes the reader from the very basics of III-V semiconductors (some preparation in quantum mechanics and electromagnetism is helpful) and shows how seemingly obscure results such as detailed forms of the Hamiltonian, optical transition strengths, and recombination mechanisms follow.

Domain Walls

Domain Walls PDF
Author: Dennis Meier
Publisher: Oxford University Press, USA
ISBN: 0198862490
Size: 74.86 MB
Format: PDF
Category : Science
Languages : en
Pages : 368
View: 1253

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As the first of its kind, this book identifies major questions and challenges that will influence research on domain walls in the years to come.

Nanomagnetism

Nanomagnetism PDF
Author:
Publisher: Elsevier
ISBN: 9780080457178
Size: 77.71 MB
Format: PDF, Kindle
Category : Technology & Engineering
Languages : en
Pages : 348
View: 7247

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Nanoscience is of central importance in the physical and biological sciences and is now pervasive in technology. However nanomagnetism has a special role to play as magnetic properties depend uniquely on both dimensionality and lengthscales. Nanomagnetism is already central to data storage, sensor and device technologies but is increasingly being used in the life sciences and medicine. This volume aims to introduce scientists, computer scientists, engineers and technologists from diverse fields to this fascinating and technologically important new branch of nanoscience. The volume should appeal to both the interested general reader but also to the researcher wishing to obtain an overview of this fast moving field. The contributions come from acknowledged leaders in the field who each give authoritative accounts of key fundamental aspects of nanomagnetism to which they have themselves made a major contribution. After a brief introduction by the editors, Wu first surveys the fundamental properties of magnetic nanostructures. The interlayer exchange interactions within magnetic multilayer structures is next discussed by Stiles. Camley then discusses the static, dynamic and thermal properties of magnetic multilayers and nanostructures, followed by an account of the phenomenon of exchange anisotropy by Berkowitz and Kodama. This latter phenomenon is widely in current read head devices for example. The transport properties of nanostructures also are spectacular, and again underpin computer technology, as we see from the discussion of giant magnetoresistance (GMR) and tunnelling magnetoresistance (TMR) presented by Fert and his colleagues. Beyond GMR and TMR we look to the field of spintronics where new electronic devices are envisioned and for which quantum computing may depend as discussed in the chapter by Flatte and Jonker. The volume concludes with discussion of the recently discovered phenomenon of current induced switching of magnetization by Edwards and Mathon. * Subject is in the forefront of nanoscience * All Section authors are leading figures in this key field * Presentations are accessible to non specialists, with focus on underlying fundamentals

Manipulating Quantum Coherence In Solid State Systems

Manipulating Quantum Coherence in Solid State Systems PDF
Author: Michael E. Flatté
Publisher: Springer Science & Business Media
ISBN: 1402061358
Size: 27.75 MB
Format: PDF, Kindle
Category : Science
Languages : en
Pages : 234
View: 700

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This book features the proceedings of the NATO Advanced Study Institute "Manipulating Quantum Coherence in Solid State Systems", held in Cluj-Napoca, Romania, August 2005, which presented a fundamental introduction to solid-state approaches to achieving quantum computation. This proceedings volume describes the properties of quantum coherence in semiconductor spin-based systems and the behavior of quantum coherence in superconducting systems.

Semiconductor Spintronics And Quantum Computation

Semiconductor Spintronics and Quantum Computation PDF
Author: D.D. Awschalom
Publisher: Springer Science & Business Media
ISBN: 366205003X
Size: 52.74 MB
Format: PDF, ePub, Docs
Category : Technology & Engineering
Languages : en
Pages : 311
View: 4335

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The past few decades of research and development in solid-state semicon ductor physics and electronics have witnessed a rapid growth in the drive to exploit quantum mechanics in the design and function of semiconductor devices. This has been fueled for instance by the remarkable advances in our ability to fabricate nanostructures such as quantum wells, quantum wires and quantum dots. Despite this contemporary focus on semiconductor "quantum devices," a principal quantum mechanical aspect of the electron - its spin has it accounts for an added quan largely been ignored (except in as much as tum mechanical degeneracy). In recent years, however, a new paradigm of electronics based on the spin degree of freedom of the electron has begun to emerge. This field of semiconductor "spintronics" (spin transport electron ics or spin-based electronics) places electron spin rather than charge at the very center of interest. The underlying basis for this new electronics is the intimate connection between the charge and spin degrees of freedom of the electron via the Pauli principle. A crucial implication of this relationship is that spin effects can often be accessed through the orbital properties of the electron in the solid state. Examples for this are optical measurements of the spin state based on the Faraday effect and spin-dependent transport measure ments such as giant magneto-resistance (GMR). In this manner, information can be encoded in not only the electron's charge but also in its spin state, i. e.

Optical Generation And Control Of Quantum Coherence In Semiconductor Nanostructures

Optical Generation and Control of Quantum Coherence in Semiconductor Nanostructures PDF
Author: Gabriela Slavcheva
Publisher: Springer Science & Business Media
ISBN: 3642124917
Size: 15.11 MB
Format: PDF, ePub, Docs
Category : Science
Languages : en
Pages : 338
View: 6380

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The fundamental concept of quantum coherence plays a central role in quantum physics, cutting across disciplines of quantum optics, atomic and condensed matter physics. Quantum coherence represents a universal property of the quantum s- tems that applies both to light and matter thereby tying together materials and p- nomena. Moreover, the optical coherence can be transferred to the medium through the light-matter interactions. Since the early days of quantum mechanics there has been a desire to control dynamics of quantum systems. The generation and c- trol of quantum coherence in matter by optical means, in particular, represents a viable way to achieve this longstanding goal and semiconductor nanostructures are the most promising candidates for controllable quantum systems. Optical generation and control of coherent light-matter states in semiconductor quantum nanostructures is precisely the scope of the present book. Recently, there has been a great deal of interest in the subject of quantum coh- ence. We are currently witnessing parallel growth of activities in different physical systems that are all built around the central concept of manipulation of quantum coherence. The burgeoning activities in solid-state systems, and semiconductors in particular, have been strongly driven by the unprecedented control of coherence that previously has been demonstrated in quantum optics of atoms and molecules, and is now taking advantage of the remarkable advances in semiconductor fabrication technologies. A recent impetus to exploit the coherent quantum phenomena comes from the emergence of the quantum information paradigm.