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Author : H. Haken
Publisher : Springer
ISBN 13 : 3540378669
Total Pages : 303 pages
Book Rating : 4.5/5 (43 download)
Download or read book Excitons at High Density written by H. Haken and published by Springer. This book was released on 2006-04-11 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Donald C. Reynolds
Publisher : Elsevier
ISBN 13 : 0323156762
Total Pages : 304 pages
Book Rating : 4.3/5 (231 download)
Download or read book Excitons written by Donald C. Reynolds and published by Elsevier. This book was released on 2012-12-02 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excitons: Their Properties and Uses presents the fundamental properties of excitons and emphasizes the extensive use of excitons as a tool in understanding the properties of materials. This book explores the basic and technological importance of the physical parameters of materials. Organized into eight chapters, this text starts with a discussion on the theoretical aspects of excitons, and then explores the high-density exciton systems in which the interaction between the constituents is important. Other chapters discuss the experimental observations of exciton phenomena with proper theoretical interpretation of the data. The reader is then introduced to the interactions of excitons with other systems. The final chapter examines the experimental techniques used in the study of excitons and the importance of excitons in materials technology. This book is a valuable resource for scientists and researchers working with semiconductors and other areas of materials technology. Second-year graduate students of solid-state physics will find this book extremely useful.
Author : G Hohler (ed)
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (985 download)
Download or read book EXCITONS AT HIGH DENSITY. written by G Hohler (ed) and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Svi︠a︡toslav Anatolʹevich Moskalenko
Publisher : Cambridge University Press
ISBN 13 : 9780521580991
Total Pages : 434 pages
Book Rating : 4.5/5 (89 download)
Download or read book Bose-Einstein Condensation of Excitons and Biexcitons written by Svi︠a︡toslav Anatolʹevich Moskalenko and published by Cambridge University Press. This book was released on 2000-02-28 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bose-Einstein condensation of excitons is a unique effect in which the electronic states of a solid can self-organize to acquire quantum phase coherence. The phenomenon is closely linked to Bose-Einstein condensation in other systems such as liquid helium and laser-cooled atomic gases. This is the first book to provide a comprehensive survey of this field, covering theoretical aspects as well as recent experimental work. After setting out the relevant basic physics of excitons, the authors discuss exciton-phonon interactions as well as the behaviour of biexcitons. They cover exciton phase transitions and give particular attention to nonlinear optical effects including the optical Stark effect and chaos in excitonic systems. The thermodynamics of equilibrium, quasi-equilibrium, and nonequilibrium systems are examined in detail. The authors interweave theoretical and experimental results throughout the book, and it will be of great interest to graduate students and researchers in semiconductor and superconductor physics, quantum optics, and atomic physics.
Author : Bernhard Johann Bohn
Publisher : Springer Nature
ISBN 13 : 303070940X
Total Pages : 169 pages
Book Rating : 4.0/5 (37 download)
Download or read book Exciton Dynamics in Lead Halide Perovskite Nanocrystals written by Bernhard Johann Bohn and published by Springer Nature. This book was released on 2021-05-18 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Less than a decade ago, lead halide perovskite semiconductors caused a sensation: Solar cells exhibiting astonishingly high levels of efficiency. Recently, it became possible to synthesize nanocrystals of this material as well. Interestingly; simply by controlling the size and shape of these crystals, new aspects of this material literally came to light. These nanocrystals have proven to be interesting candidates for light emission. In this thesis, the recombination, dephasing and diffusion of excitons in perovskite nanocrystals is investigated using time-resolved spectroscopy. All these dynamic processes have a direct impact on the light-emitting device performance from a technology point of view. However, most importantly, the insights gained from the measurements allowed the author to modify the nanocrystals such that they emitted with an unprecedented quantum yield in the blue spectral range, resulting in the successful implementation of this material as the active layer in an LED. This represents a technological breakthrough, because efficient perovskite light emitters in this wavelength range did not exist before.
Author : H. Q. Le
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (227 download)
Download or read book High Density Excitonic State in Two-Dimensional Multiquantum Wells written by H. Q. Le and published by . This book was released on 1984 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A sharp photoluminescence spectral feature has been observed in AlGaAs. GaAs multi-quantum-well structures under high intensity, resonant excitation at the ground state exciton. This feature, which appears below the exciton ground state, emerges from a cold dense system of excitons, but prior to the break-up of excitons into an electron-hole plasma. A collective excitonic state is speculated.
Author : N. G. Basov
Publisher : Springer Science & Business Media
ISBN 13 : 1461585732
Total Pages : 117 pages
Book Rating : 4.4/5 (615 download)
Download or read book Exciton and Domain Luminescence of Semiconductors written by N. G. Basov and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume, which comprises a collection of papers by leading Soviet researchers, is devoted to topics in the luminescence of semiconductors. An experimental check is made on a series of predictions of the theory of ionization domains. A new low-voltage luminescence of zinc sulfide is described and investigated and is found to be due to a high-frequency electrical instability. A detailed study of the electrical properties of the instability and of the characteristics of the emission testifies to the pre-breakdown character of the electroluminescence and to the acousto electrical nature of the instability. The luminescence excitation spectra of AIN crystals excited in the region of the fundamental absorption contain lines belonging to excitons and their phonon replicas. The symmetry of the electronic and vibrational transitions corresponding to parts of these lines is interpreted. The results of a study of the scattering of light by electron - hole drops in germanium are cited. The results are discussed on the basis of a theory of exciton condensation in which allowance is made for the diffusion of excitons toward the surface of the drops and for the surface tens ion of the electron - hole liquid. This volume will be of interest to a wide range of scientific workers, particularly those engaged in the study of luminescence and physics of semiconductors.
Author : Masayasu Ueta
Publisher : Springer Science & Business Media
ISBN 13 : 3642826024
Total Pages : 544 pages
Book Rating : 4.6/5 (428 download)
Download or read book Excitonic Processes in Solids written by Masayasu Ueta and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: An exciton is an electronic excitation wave consisting of an electron-hole pair which propagates in a nonmetallic solid. Since the pioneering research of Fren kel, Wannier and the Pohl group in the 1930s, a large number of experimental and theoretical studies have been made. Due to these investigations the exciton is now a well-established concept and the electronic structure has been clarified in great detail. The next subjects for investigation are, naturally, dynamical processes of excitons such as excitation, relaxation, annihilation and molecule formation and, in fact, many interesting phenomena have been disclosed by recent works. These excitonic processes have been recognized to be quite important in solid-state physics because they involve a number of basic interactions between excitons and other elementary excitations. It is the aim of this quasi monograph to describe these excitonic processes from both theoretical and experimental points of view. we take a few To discuss and illustrate the excitonic processes in solids, important and well-investigated insulating crystals as playgrounds for excitons on which they play in a manner characteristic of each material. The selection of the materials is made in such a way that they possess some unique properties of excitonic processes and are adequate to cover important interactions in which excitons are involved. In each material, excitonic processes are described in detail from the experimental side in order to show the whole story of excitons in a particular material.
Author : M.H. Pilkuhn
Publisher : Elsevier
ISBN 13 : 0444600183
Total Pages : 622 pages
Book Rating : 4.4/5 (446 download)
Download or read book High Excitation and Short Pulse Phenomena written by M.H. Pilkuhn and published by Elsevier. This book was released on 2012-12-02 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Excitation and Short Pulse Phenomena contains the proceeding of the Third Trieste ICTP-IUPAP Semiconductor Symposium on ""High Excitation and Short Pulse Phenomena"", held at the International Center for Theoretical Physics, Trieste, Italy on July, 2-6 1984. This book contains the keynote papers of the symposium and the contributions from the participants. It describes the non-equilibrium electron-hole plasmas in direct and indirect gap semiconductors; transport of plasmas and of hot carriers; and expansion velocities. The book also elucidates the screening effects involved in the exciton-plasma transition; the optical bistability and nonlinearity; and experimental techniques with short pulse spectroscopy. Other topics emphasized are the physical aspects of laser annealing and of melting at the highest excitation levels, as well as the results of high excitation and short pulse physics of quantum wells. The fast relaxation processes, as well as the carrier-carrier and carrier-phonon interactions are also explained. This material will serve as a source of information and reference, and will stimulate ways for further research.
Author : Hiroto Kuroda
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (246 download)
Download or read book Dynamical Processes of High Density Single Excitons and Excitonic Molecules in CdSe written by Hiroto Kuroda and published by . This book was released on 1973 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ion Geru
Publisher : Springer
ISBN 13 : 3642358071
Total Pages : 289 pages
Book Rating : 4.6/5 (423 download)
Download or read book Resonance Effects of Excitons and Electrons written by Ion Geru and published by Springer. This book was released on 2013-06-01 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the various types of resonance effects on excitons, biexcitons and the local electronic centers (LEC) in solids, such as paramagnetic and paraelectric resonances on excitons, exciton acoustic resonance at intra- and interband transitions, radio-optical double resonance on excitons, hole-nuclear double resonance on localized biexcitons, ENDOR and acoustic ENDOR on LEC. The criteria for the generation of coherent photons, phonons and magnons by excitons are explained. The interactions of excitons and biexcitons with paramagnetic centers and nuclear spins, the indirect interaction between the PC through a field of excitons as well as the quasienergy spectrum of excitons and spin systems are discussed. It is proved that the interaction of paramagnetic centers with excitons increases the spin relaxation rate of paramagnetic centers in comparison with the case of their interaction with free carriers. The giant magneto-optical effects in semi-magnetic semiconductors are theoretically interpreted. In recent years, a new perspective has been added to these systems and their interactions: They can be used for storing and processing information in the form of quantum bits (qubits), the building blocks of quantum computers. The basics of this emerging technology are explained and examples of demonstration-type quantum computers based on localized spins in solids are discussed.
Author : Sergei Pyshkin
Publisher : BoD – Books on Demand
ISBN 13 : 9535138693
Total Pages : 102 pages
Book Rating : 4.5/5 (351 download)
Download or read book Excitons written by Sergei Pyshkin and published by BoD – Books on Demand. This book was released on 2018-03-14 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excitons, as part of the InTech collection of international works on optics and optoelectronics, contains recent achievements of specialists from China, France, Japan, Switzerland, and Moldova jointly with Russia and the United States of America on properties and application of excitons in electronics. The growing number of countries participating in this endeavor and joint participation of the US, Moldova, Italy, and Russian scientists in investigations of excitons in the edition of this book testify to the unifying effect of science. An interested reader will find in the book the description of properties and possible applications of excitons, as well as the methods of fabrication and analysis of operation and the regions of application of modern excitonic devices.
Author : Richard T. Williams
Publisher : The Electrochemical Society
ISBN 13 : 9781566772198
Total Pages : 594 pages
Book Rating : 4.7/5 (721 download)
Download or read book Proceedings of the Third International Conference on Excitonic Processes in Condensed Matter, EXCON '98 written by Richard T. Williams and published by The Electrochemical Society. This book was released on 1998 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nie Luo
Publisher : CRC Press
ISBN 13 : 1000000729
Total Pages : 289 pages
Book Rating : 4.0/5 ( download)
Download or read book High-Tc Superconductivity written by Nie Luo and published by CRC Press. This book was released on 2021-02-25 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: The exciton mechanism of high-Tc superconductivity in copper oxides was initially proposed by Prof. J. Bardeen. His insight is largely shared by another luminary in superconductivity, Prof. V. L. Ginzburg. The main author of the book, Dr. Nie Luo, was motivated by their insights to give a geometrical explanation to the excitonic Coulomb interaction and has developed a unique formalism to understand and predict physical properties of high-Tc superconductors. This work is supported by increasingly strong evidence for electron–hole interactions in p-type cuprates. The presence of electrons in hole-doped cuprates is revealed by the works of the authors and many others, including the late Prof. L. P. Gor’kov. The book also tries to understand the interlayer Coulomb (ILC) pairing model by the excitonic Coulomb interaction. Developed by Prof. A. J. Leggett, ILC theory shares many views with Ginzburg’s approach. The other author of the book, Prof. George H. Miley, shares with us his personal experience with Prof. Bardeen on the exciton’s role in physics problems including high-Tc superconductivity. The results and predictions of this excitonic Coulomb mechanism have been verified by an increasing number of experiments. This book summarizes the current status and fathoms future directions.
Author : Konstantinos Lagoudakis
Publisher : EPFL Press
ISBN 13 : 2940222754
Total Pages : 180 pages
Book Rating : 4.9/5 (42 download)
Download or read book The Physics of Exciton-Polariton Condensates written by Konstantinos Lagoudakis and published by EPFL Press. This book was released on 2013-11-22 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2006 researchers created the first polariton Bose-Einstein condensate at 19K in the solid state. Being inherently open quantum systems, polariton condensates open a window into the unpredictable world of physics beyond the “fifth state of matter”: the limited lifetime of polaritons renders polariton condensates out-of-equilibrium and provides a fertile test-bed for non-equilibrium physics. This book presents an experimental investigation into exciting features arising from this non-equilibrium behavior. Through careful experimentation, the author demonstrates the ability of polaritons to synchronize and create a single energy delocalized condensate. Under certain disorder and excitation conditions the complete opposite case of coexisting spatially overlapping condensates may be observed. The author provides the first demonstration of quantized vortices in polariton condensates and the first observation of fractional vortices with full phase and amplitude characterization. Finally, this book investigates the dynamics of polariton populations trapped in neighboring potential traps – and shows that coherent population oscillations are observed – in direct analogy to the AC Josephson effect. This book puts significant weight on both the details of the experimental techniques and the theoretical tools used pick apart the experimental findings making it an invaluable aide for condensed matter researchers interested in exciton-polaritons condensates.
Author : Kikuo Cho
Publisher : World Scientific
ISBN 13 : 9814491306
Total Pages : 496 pages
Book Rating : 4.8/5 (144 download)
Download or read book Excitonic Processes In Condensed Matter, Proceedings Of 2000 International Conference (Excon2000) written by Kikuo Cho and published by World Scientific. This book was released on 2001-08-22 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: At Yamada Conference LIII, papers on many novel materials and on novel phenomena in condensed matter physics were presented — for instance, the achievement of simultaneous creation of excitons and free-electron-hole pairs in rare gas solids, and a low frequency fluctuation of the spectral shift of indirect excitons in GaAs coupled quantum wells. Single molecule spectroscopy is a powerful tool for studying molecules including biological systems; the study of delocalization of excitons in the photosynthetic light harvesting antenna system was also reported. The proceedings thus contain many excellent papers dealing with current research topics on the excitonic processes in bulk, quantum wells, quantum dots and other confined systems. This book will serve as an excellent source of recent references and reviews for a wide range of researchers in physics, chemistry, engineering and biological sciences.The proceedings have been selected for coverage in:• Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings)
Author : J.T. Devreese
Publisher : Springer Science & Business Media
ISBN 13 : 1461326931
Total Pages : 483 pages
Book Rating : 4.4/5 (613 download)
Download or read book Polarons and Excitons in Polar Semiconductors and Ionic Crystals written by J.T. Devreese and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1982 Antwerp Advanced Study Institute on "Physics of Polarons and Excitons in Polar Semiconductors and Ionic Crystals" took place from July 26 till August 5 at the Conference Center Priorij Corsen donk, a restored monastery, close to the city of Antwerp. It was the seventh Institute in our series which started in 1971. This Advanced Study Institute, which was held fifty years after Landau introduced the polaron concept, can be considered as the third major international symposium devoted to the physics of pola rons. The first such symposium took place in St. Andrews in 1962 under the title "Polarons and Excitons" [I]. The early theoretical developments related to polarons were reviewed in depth at this meeting; the derivation of the polaron hamiltonian by Frohlich, the Frohlich weak coupling theory (and the equivalent weak coupling canonical transformations), the Landau-Pekar and Bogolubov strong coupling theory and the Feynman polaron model formulated with his path integrals. The main emphasis was on the polaron self-energy, effective mass and mobility. From the experimental side the first evidence for polaron effects was provided by the pioneering cyclotron and mobility measurements o~ the silver halides by F. e. Brown and his group. Also the significance of polaron effects for the under standing of excitons in ionic crystals was a central topic in St. Andrews. The second Advanced Study Institute concerning polaron physics was organized at the University of Antwerp (R. U. C. A.
