Download or read book Symmetry and Symmetry Breaking in Semiconductors written by Bernd Hönerlage and published by Springer. This book was released on 2018-09-19 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses group theory investigations of zincblende and wurtzite semiconductors under symmetry-breaking conditions. The text presents the group theory elements required to develop a multitude of symmetry-breaking problems, giving scientists a fast track to bypass the need for recalculating electronic states. The text is not only a valuable resource for speeding up calculations but also illustrates the construction of effective Hamiltonians for a chosen set of electronic states in crystalline semiconductors. Since Hamiltonians have to be invariant under the transformations of the point group, the crystal symmetry determines the multiplet structure of these states in the presence of spin-orbit, crystal-field, or exchange interactions. Symmetry-breaking leads to additional coupling of the states, resulting in shifts and/or splittings of the multiplets. Such interactions may be intrinsic, as in the case of the quasi-particle dispersion, or extrinsic, induced by magnetic, electric, or strain fields. Using a power expansion of the perturbations these interaction terms can be determined in their parameterized form in a unique way. The hierarchic structure of this invariant development allows to estimate the importance of particular symmetry-breaking effects in the Hamiltonian. A number of selected experimental curves are included to illustrate the symmetry-based discussions, which are especially important in optical spectroscopy. This text is written for graduate students and researchers who want to understand and simulate experimental findings reflecting the fine structure of electronic or excitonic states in crystalline semiconductors.
Download or read book Patterns of Symmetry Breaking written by Henryk Arodz and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conceptofspontaneous symmetry breaking plays a fundamental role in contemporary physics. It is essential for the description of degenerate ground states, massless modes, and topological defects. Examples are abundant in condensed matter physics, atomic and particle physics, as well as in astro physics and cosmology. In fact, spontaneous symmetry breaking can be re garded as a cornerstone ofa whole branch ofphysics which intersects the above mentioned traditionally distinct fields. In the year 2000 the European Science Foundation (ESF) started the Pro gramme "Cosmology in the Laboratory" (COSLAB), with the goal to search for and to develop analogies betweencondensed matterphysics, particle physics, and cosmology. Not surprisingly, spontaneous symmetry breaking is among the most useful notions in that endeavour. It has been decided that in the sec ond year of the Programme a School should be held in order to work out and deliver to a wide audience of students synthetic overviews of achievements and of current research topics of COSLAB. This idea has been supported by the Scientific and Environmental Affairs Division of NATO by including the School in the renowned series of its Advanced Study Institutes. The School, entitled" Patterns of Symmetry Breaking", was held in Cracow during 16-28 September 2002. It gathered 17 lecturers and about 60 students. The present volume contains notes ofmost of the lectures from that School. We hope that of the physics of spon it will convey to the reader the breadth and the beauty taneous symmetry breaking.
Download or read book Symmetry Breaking written by Franco Strocchi and published by Springer. This book was released on 2009-09-02 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new edition of this well received primer on rigorous aspects of symmetry breaking presents a more detailed and thorough discussion of the mechanism of symmetry breaking in classical field theory in relation with the Noether theorem. Moreover, the link between symmetry breaking without massless Goldstone bosons in Coulomb systems and in gauge theories is made more explicit. A subject index has been added and a number of misprints have been corrected.
Download or read book Symmetry Breaking written by Franco Strocchi and published by Springer. This book was released on 2007-11-19 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new edition of this well received primer on rigorous aspects of symmetry breaking presents a more detailed and thorough discussion of the mechanism of symmetry breaking in classical field theory in relation with the Noether theorem. Moreover, the link between symmetry breaking without massless Goldstone bosons in Coulomb systems and in gauge theories is made more explicit. A subject index has been added and a number of misprints have been corrected.
Download or read book Spontaneous Symmetry Breaking Self Trapping and Josephson Oscillations written by Boris A. Malomed and published by Springer. This book was released on 2013-05-29 with total page 707 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume collects a a number of contributions on spontaneous symmetry breaking. Current studies in this general field are going ahead at a full speed. The book present review chapters which give an overview on the major break throughs of recent years. It covers a number of different physical settings which are introduced when a nonlinearity is added to the underlying symmetric problems and its strength exceeds a certain critical value. The corresponding loss of symmetry, called spontaneous symmetry breaking, alias self-trapping into asymmetric states is extensively discussed in this book. The book presents both active theoretical studies of spontaneous symmetry breaking effects as well as experimental findings, chiefly for Bose-Einstein-Condensates with the self-repulsive nonlinearity, and also for photorefractive media in optics.
Download or read book Explicit Symmetry Breaking in Electrodynamic Systems and Electromagnetic Radiation written by Dhiraj Sinha and published by Morgan & Claypool Publishers. This book was released on 2016-04-01 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction to the concept of symmetries in electromagnetism and explicit symmetry breaking. It begins with a brief background on the origin of the concept of symmetry and its meaning in fields such as architecture, mathematics and physics. Despite the extensive developments of symmetry in these fields, it has yet to be applied to the context of classical electromagnetism and related engineering applications. This book unravels the beauty and excitement of this area to scientists and engineers.
Download or read book Symmetry breaking in classical systems written by Franco Strocchi and published by Edizioni della Normale. This book was released on 1999-10-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: These notes essentially reproduce lectures given at the International School for Advances Studies (Trieste) and at the Scuola Normale Superiore (Pisa) on various occasions. The scope of the short series of lectures was to extend on general grounds, also to mathematicians, the phenomenon of Spontaneous Symmetry Breaking (SSB), a mechanism which seems at the basis of the recent developments in theoretical physics (from statistical mechanics to many-body theory and to elementary particle theory). Besides its extraordinary success, the idea of SSB deserves being discussed also because of its innovative philosophical content and in our opinion it should be part of the background knowledge for mathematical and theoretical physics students, especially those who are interested in questions of principle and in general mathematical structures.
Download or read book Inverse Symmetry Breaking in Low Dimensional Systems written by Niculin A. Saratz and published by Logos Verlag Berlin GmbH. This book was released on 2010 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Competing interactions on different length scales are responsible for the spontaneous formation of modulated phases - patterns - in many physical and chemical systems. In this thesis we investigate the magnetic domain patterns of atomically-thin iron films on the copper (001)-surface in the two-parameter space spanned by temperature and the applied magnetic field. Upon heating the sample in a constant applied field, we observe a transition from the uniform, saturated state to circular domains in a homogeneous background, the bubble state. This transition breaks the translational symmetry of the domain pattern and a second transition, leading from bubbles to regular stripes of alternating magnetization, breaks also the rotational symmetry: The phase diagram of the system shows systematic inverse symmetry breaking. In our experiments we observe scaling and universality also in this regime of inverse symmetry breaking. By exploiting these scaling properties, we can predict the phase diagram at high temperature from ground-state calculations and we find that the occurrence of inverse symmetry breaking is a consequence of the truly two-dimensional nature of our system. Dynamic aspects of the pattern formation are addressed in time-dependent measurements. We find that the temperature dependence of the relaxation times, measured in response to changing temperature or magnetic field, points towards a non-Arrhenius-like behaviour, as is typical in glassy systems.
Download or read book Symmetry and Strain induced Effects in Semiconductors written by Gennadiĭ Levikovich Bir and published by . This book was released on 1974 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Symmetry Breaking written by Rui Tamura and published by Mdpi AG. This book was released on 2021-07-26 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book entitled "Chemical Symmetry Breaking" is a collective volume of state-of-the-art reports on unique nonlinear chemical and physical symmetry-breaking phenomena that were experimentally observed upon a thermally or photochemically induced phase transition in various organic condensed phases, such as metastable liquid crystals, crystals, amorphous solids, and colloidal polymer materials, only under nonequilibrium conditions. Each author summarizes the introductory section in simple terms but in detail for beginners in this field. We wish that many readers familiarize themselves with the general concepts and features of nonlinear and nonequilibrium (or out of equilibrium) complexity theory, which govern a variety of unique dynamic behaviors observed in chemistry, physics, life science and other fields, so that they may discover novel symmetry-breaking phenomena in their own research areas.
Download or read book Symmetry and Strain induced Effects in Semiconductors written by Gennadij Levikovic Bir and published by . This book was released on 1974 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Semiconductor Optics 1 written by Heinz Kalt and published by Springer Nature. This book was released on 2019-09-20 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: This revised and updated edition of the well-received book by C. Klingshirn provides an introduction to and an overview of all aspects of semiconductor optics, from IR to visible and UV. It has been split into two volumes and rearranged to offer a clearer structure of the course content. Inserts on important experimental techniques as well as sections on topical research have been added to support research-oriented teaching and learning. Volume 1 provides an introduction to the linear optical properties of semiconductors. The mathematical treatment has been kept as elementary as possible to allow an intuitive approach to the understanding of results of semiconductor spectroscopy. Building on the phenomenological model of the Lorentz oscillator, the book describes the interaction of light with fundamental optical excitations in semiconductors (phonons, free carriers, excitons). It also offers a broad review of seminal research results augmented by concise descriptions of the relevant experimental techniques, e.g., Fourier transform IR spectroscopy, ellipsometry, modulation spectroscopy and spatially resolved methods, to name a few. Further, it picks up on hot topics in current research, like quantum structures, mono-layer semiconductors or Perovskites. The experimental aspects of semiconductor optics are complemented by an in-depth discussion of group theory in solid-state optics. Covering subjects ranging from physics to materials science and optoelectronics, this book provides a lively and comprehensive introduction to semiconductor optics. With over 120 problems, more than 480 figures, abstracts to each chapter, as well as boxed inserts and a detailed index, it is intended for use in graduate courses in physics and neighboring sciences like material science and electrical engineering. It is also a valuable reference resource for doctoral and advanced researchers.
Download or read book Symmetry Breaking and Restoration in Models with Extended Gauge Symmetries written by Timothy Hall Farris and published by . This book was released on 1991 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Extra Dimesnions in High Energy Physics written by Tirthabir Biswas and published by . This book was released on 2003 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electroweak Symmetry Breaking written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electroweak Symmetry Breaking written by Wolfgang Kilian and published by Springer Science & Business Media. This book was released on 2003-09-02 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The systematic bottom-up approach provides the appropriate framework for interpreting measurements that will be performed to better understand the physics of mass generation in the universe. No knowledge of quantum field theory is required other than familiarity with effective Lagrangians and Feynmann diagrams.
Download or read book Materials and Reliability Handbook for Semiconductor Optical and Electron Devices written by Osamu Ueda and published by Springer Science & Business Media. This book was released on 2012-09-22 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials and Reliability Handbook for Semiconductor Optical and Electron Devices provides comprehensive coverage of reliability procedures and approaches for electron and photonic devices. These include lasers and high speed electronics used in cell phones, satellites, data transmission systems and displays. Lifetime predictions for compound semiconductor devices are notoriously inaccurate due to the absence of standard protocols. Manufacturers have relied on extrapolation back to room temperature of accelerated testing at elevated temperature. This technique fails for scaled, high current density devices. Device failure is driven by electric field or current mechanisms or low activation energy processes that are masked by other mechanisms at high temperature. The Handbook addresses reliability engineering for III-V devices, including materials and electrical characterization, reliability testing, and electronic characterization. These are used to develop new simulation technologies for device operation and reliability, which allow accurate prediction of reliability as well as the design specifically for improved reliability. The Handbook emphasizes physical mechanisms rather than an electrical definition of reliability. Accelerated aging is useful only if the failure mechanism is known. The Handbook also focuses on voltage and current acceleration stress mechanisms.
