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Author : Sarah Hobbs
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (111 download)
Download or read book Development of Resonant Inelastic X-ray Scattering Spectroscopy written by Sarah Hobbs and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anselm Wolfgang Hahn
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (15 download)
Download or read book Development and Application of Resonant Inelastic X-ray Scattering Spectroscopy in Inorganic Chemistry written by Anselm Wolfgang Hahn and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rowena Thomas
Publisher :
ISBN 13 :
Total Pages : 166 pages
Book Rating : 4.:/5 (111 download)
Download or read book Development of Resonant Inelastic X-ray Scattering and Spectroscopy for 4d and 5d Transition Metal Catalysts written by Rowena Thomas and published by . This book was released on 2013 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Eberhard J. Jaeschke
Publisher : Springer
ISBN 13 : 9783319143934
Total Pages : 0 pages
Book Rating : 4.1/5 (439 download)
Download or read book Synchrotron Light Sources and Free-Electron Lasers written by Eberhard J. Jaeschke and published by Springer. This book was released on 2016-05-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardly any other discovery of the nineteenth century did have such an impact on science and technology as Wilhelm Conrad Röntgen’s seminal find of the X-rays. X-ray tubes soon made their way as excellent instruments for numerous applications in medicine, biology, materials science and testing, chemistry and public security. Developing new radiation sources with higher brilliance and much extended spectral range resulted in stunning developments like the electron synchrotron and electron storage ring and the freeelectron laser. This handbook highlights these developments in fifty chapters. The reader is given not only an inside view of exciting science areas but also of design concepts for the most advanced light sources. The theory of synchrotron radiation and of the freeelectron laser, design examples and the technology basis are presented. The handbook presents advanced concepts like seeding and harmonic generation, the booming field of Terahertz radiation sources and upcoming brilliant light sources driven by laser-plasma accelerators. The applications of the most advanced light sources and the advent of nanobeams and fully coherent x-rays allow experiments from which scientists in the past could not even dream. Examples are the diffraction with nanometer resolution, imaging with a full 3D reconstruction of the object from a diffraction pattern, measuring the disorder in liquids with high spatial and temporal resolution. The 20th century was dedicated to the development and improvement of synchrotron light sources with an ever ongoing increase of brilliance. With ultrahigh brilliance sources, the 21st century will be the century of x-ray lasers and their applications. Thus, we are already close to the dream of condensed matter and biophysics: imaging single (macro)molecules and measuring their dynamics on the femtosecond timescale to produce movies with atomic resolution.
Author : Rowena Thomas
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (868 download)
Download or read book Development of Resonant Inelastic X-ray Metal Catalysts Scattering Spectroscopy for 4d and 5d Transition Metal Catalysts written by Rowena Thomas and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrey Geondzhian
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (11 download)
Download or read book Resonant Inelastic X-ray Scattering as a Probe of Exciton-phonon Coupling written by Andrey Geondzhian and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phonons contribute to resonant inelastic X-ray scattering (RIXS) as a consequence of the coupling between electronic and lattice degrees of freedom. Unlike other techniques that are sensitive to electron-phonon interactions, RIXS can give access to momentum dependent coupling constants. Information about the dispersion of the electron-phonon interaction is highly desirable in the context of understanding anisotropic conventional and unconventional superconductivity.We considered the phonon contribution to RIXS from the theoretical point of view. In contrast to previous studies, we emphasize the role of the core-hole lattice coupling. Our model, with parameters obtained from first principles, shows that even in the case of a deep core-hole, RIXS probes exciton-phonon coupling rather than a direct electron-phonon coupling.This difference leads to quantitative and qualitative deviations from the interpretation of the implied electron-phonon coupling from the standard view expressed in the literature. Thus, our objective is to develop a rigorous approach to quantify electron-phonon coupling within the context of RIXS measurements. The ability to accurately reproduce experimental results from first-principles calculations, without recourse to adjustable parameters, should be viewed as the ultimate test of a proper understanding of the phonon contribution to RIXS.We start by considering only the core-hole--phonon interaction within the context of X-ray photoemission spectroscopy. We combine an ab initio calculation of the real-space response function with many-body Green's functions techniques to reproduce the vibrational side-bands in SiX4 (X=H, F) molecules. The approach we developed is suitable for application to crystalline materials.We next consider the phonon contribution to X-ray absorption spectra. Unlike the charged excitations generated by X-ray photoemission, X-ray absorption creates a neutral excitation that we approximate as a core-hole and an excited electron. We first solved the electronic part of the problem on the level of the Bethe-Salpeter equation and then dressed the resulting 2-particle excitonic quasiparticle with the exciton-phonon interactions using the cumulant ansatz. The viability of this methodology was tested by calculating the N K-edge XAS of the N2 molecule and the O K-edge of acetone. The resulting vibronic spectra agreed favorably with experimental results.Finally, we construct a hybrid formulation of the RIXS cross section that preserves explicit summation over a small number of final states, but replaces the summation over intermediate states, which might be enormously expensive, with a Green's function. We develop an expansion of the Green's function and derive both analytically exact (in the no-recoil limit) and approximate solutions. The formalism was again tested on the O K-edge of acetone and agrees well with the experiment. To provide an outlook towards future work, we discuss application of the developed formalism to crystalline materials.
Author : Hasan Yavaş
Publisher :
ISBN 13 :
Total Pages : 202 pages
Book Rating : 4.3/5 (129 download)
Download or read book A High-resolution Spectrometer for Resonant Inelastic X-ray Scattering written by Hasan Yavaş and published by . This book was released on 2007 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Xuan Gao
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.:/5 (874 download)
Download or read book Development of Polarization Analysis System of Resonant Inelastic X-ray Scattering written by Xuan Gao and published by . This book was released on 2013 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resonant inelastic x-ray scattering is a powerful technique in condensed matter physics for studying the electronic excitations in novel materials of interest. In currently operating hard x-ray scattering instruments the energy and momentum transfers are measured while the outgoing polarization is not measured due to significant technical challenges. But the outgoing polarization of the scattered photons provides valuable information about the states involved in the scattering which is difficult to determine without polarization analysis. Polarization analysis has proved extremely valuable in soft x-ray scattering and so a polarization analysis system is being developed to fill the technical void at higher energies. A polarization analyzer is designed to reflect the scattered photons from the main analyzer by about 90 degrees. At this reflecting angle, the in-plane polarization is naturally eliminated by the polarization factor so that the scattered photons perpendicular to the reflection plane are fully obtained. Therefore it can separate the two orthogonal polarizations by rotating the system by 90 degrees. The research in this dissertation is about the development of an outgoing polarization analysis system complementing for the current RIXS instrument at Advanced Photon Source. The polarization analysis system developed includes the x-ray polarization analyzer and the mechanics attached to the RIXS spectrometers and for aligning the polarization analyzer. A variety of diffraction-based polarization analyzers are being developed for different x-ray absorption edges. A polarization analyzer for Cu K-edge has been developed, and one for the Ir L3-edge has also been developed. By separating the outgoing polarization, the strong polarization dependent electron excitations, e.g. the spin-orbital excitations in iridates can be measured by the polarization analysis system. Further, the system enables us to separate and study the transverse and longitudinal magnons in Sr2IrO4, demonstrating a new capability for the RIXS technique.
Author : David L Ederer
Publisher : World Scientific
ISBN 13 : 9814547255
Total Pages : 248 pages
Book Rating : 4.8/5 (145 download)
Download or read book Raman Emission By X-ray Scattering: Proceedings Of The International Conference written by David L Ederer and published by World Scientific. This book was released on 1996-09-20 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Raman Emission by X-rays (REX-I) Workshop focused on Raman Scattering of x-rays mostly from Synchrotron Radiation Sources. The advent of new high brightness sources of x-ray radiation has given new impetus to this tantalizing technique that has offered ways of obtaining new insights into the atomic and electronic structure of solids and gases, but which has been limited by weak sources of excitation. In the last five years, Raman scattering by x-rays has been observed an ubiquitous phenomena. It has been applied to yield new information about the band structure of solids and about the electronic structure of atoms. It was the object of this workshop to identify and define key issues in this rapidly developing subfield of x-ray physics by gathering together a group of theorists and experimentalists, and by providing overlap between atomic and condensed matter physics. The workshop aimed to achieve this end by providing an environment to discuss the latest developments and to initiate cross fertilization in the difference areas.
Download or read book Theoretical Approach to Resonant Inelastic X-ray Scattering in Iron-based Superconductors at the Energy Scale of the Superconducting Gap written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, we develop a phenomenological theory to predict the characteristic features of the momentumdependent scattering amplitude in resonant inelastic x-ray scattering (RIXS) at the energy scale of the superconducting gap in iron-based super-conductors. Taking into account all relevant orbital states as well as their specific content along the Fermi surface we evaluate the charge and spin dynamical structure factors for the compounds LaOFeAs and LiFeAs, based on tight-binding models which are fully consistent with recent angle-resolved photoemission spectroscopy (ARPES) data. We find a characteristic intensity redistribution between charge and spin dynamical structure factors which discriminates between sign-reversing and sign-preserving quasiparticle excitations. Consequently, our results show that RIXS spectra can distinguish between s± and s++ wave gap functions in the singlet pairing case. In addition, we find that an analogous intensity redistribution at small momenta can reveal the presence of a chiral p-wave triplet pairing.
Author : Françoise Hippert
Publisher : Springer Science & Business Media
ISBN 13 : 1402033370
Total Pages : 580 pages
Book Rating : 4.4/5 (2 download)
Download or read book Neutron and X-ray Spectroscopy written by Françoise Hippert and published by Springer Science & Business Media. This book was released on 2006-07-08 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: - Up-to-date account of the principles and practice of inelastic and spectroscopic methods available at neutron and synchrotron sources - Multi-technique approach set around a central theme, rather than a monograph on one technique - Emphasis on the complementarity of neutron spectroscopy and X-ray spectroscopy which are usually treated in separate books
Author :
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (683 download)
Download or read book RESONANT INELASTIC X-RAY SCATTERING FROM TRANSITION METAL OXIDES. written by and published by . This book was released on 1999 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent developments in hard x-ray resonant inelastic x-ray scattering as a probe of strongly correlated systems are reviewed. Particular attention is paid to studies of Nd2CuO4. A charge transfer excitation is observed when the incident photon energy is tuned in the vicinity of the copper K-edge. It is shown that the presence of resonant enhancements is controlled by the polarization dependence of the excitation process and by the overlap between a given intermediate state and the particular excitation being studied. This latter observation has shed light on the non-local effects present in certain intermediate states.
Author : Jonathan Pelliciari
Publisher :
ISBN 13 :
Total Pages : 210 pages
Book Rating : 4.:/5 (14 download)
Download or read book Resonant Inelastic X-ray Scattering and X-ray Emission Spectroscopy Studies of Iron Pnictides written by Jonathan Pelliciari and published by . This book was released on 2016 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Time-resolved and Resonant X-ray Scattering of Strongly Correlated Materials written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Basic-Energy Sciences of the Department of Energy (BES/DOE) has made large investments in x-ray sources in the U.S. (NSLS-II, LCLS, NGLS, ALS, APS) as powerful enabling tools for opening up unprecedented new opportunities for exploring properties of matter at various length and time scales. The coming online of the pulsed photon source, literally allows us to see and follow the dynamics of processes in materials at their natural timescales. There is an urgent need therefore to develop theoretical methodologies and computational models for understanding how x-rays interact with matter and the related spectroscopies of materials. The present project addressed aspects of this grand challenge of x-ray science. In particular, our Collaborative Research Team (CRT) focused on developing viable computational schemes for modeling x-ray scattering and photoemission spectra of strongly correlated materials in the time-domain. The vast arsenal of formal/numerical techniques and approaches encompassed by the members of our CRT were brought to bear through appropriate generalizations and extensions to model the pumped state and the dynamics of this non-equilibrium state, and how it can be probed via x-ray absorption (XAS), emission (XES), resonant and non-resonant x-ray scattering, and photoemission processes. We explored the conceptual connections between the time-domain problems and other second-order spectroscopies, such as resonant inelastic x-ray scattering (RIXS) because RIXS may be effectively thought of as a pump-probe experiment in which the incoming photon acts as the pump, and the fluorescent decay is the probe. Alternatively, when the core-valence interactions are strong, one can view K-edge RIXS for example, as the dynamic response of the material to the transient presence of a strong core-hole potential. Unlike an actual pump-probe experiment, here there is no mechanism for adjusting the time-delay between the pump and the probe. However, the core hole predominantly decays via Auger processes, thereby providing an internal time-scale, which limits intermediate-state processes to timescales of a few femtoseconds. Accordingly, a number of activities directed at modeling K-, L- and M-edge RIXS in correlated materials were also pursused by our CRT. Our research effort supported by this CMCSN grant substantially advanced the understanding of x-ray scattering processes in the time-domain as well as in the more conventional scattering channels, including time-resolved photoemission, and how such processes can be modeled realistically in complex correlated materials more generally. The modeling of relaxation processes involved in time-domain spectroscopies is important also for understanding photoinduced effects such as energy conversion in photosynthesis and solar cell applications, and thus impacts the basic science for energy needs.
Author : Frank de Groot
Publisher : CRC Press
ISBN 13 : 1420008420
Total Pages : 512 pages
Book Rating : 4.4/5 (2 download)
Download or read book Core Level Spectroscopy of Solids written by Frank de Groot and published by CRC Press. This book was released on 2008-03-10 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Core level spectroscopy has become a powerful tool in the study of electronic states in solids. From fundamental aspects to the most recent developments, Core Level Spectroscopy of Solids presents the theoretical calculations, experimental data, and underlying physics of x-ray photoemission spectroscopy (XPS), x-ray absorption spectroscopy (XAS), x
Author :
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (713 download)
Download or read book Predicting the Utility of Non-Resonant Inelastic X-ray Scattering (NRIXS) for Standoff Explosives Detection written by and published by . This book was released on 2009 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research reported here was a component of a three-year program at the University of Washington to improve fundamental knowledge that is important for developing new technologies and approaches to counter improvised explosive devices (IEDs). The focus of our component was to develop methods for identifying explosive materials using X-ray spectroscopy. All chemical explosives store energy in specific, high-energy chemical bonds. Detecting and classifying explosives is a matter of analyzing the structure of these bonds by some method, either direct or indirect. One direct method is to measure the X-ray emission spectrum of the relevant elements involved in the chemical bonds, such as nitrogen or oxygen in a typical explosive. A complementary technique is provided by a particular type of non-resonant inelastic X-ray scattering (NRIXS). To investigate the feasibility of using NRIXS to detect and identify explosives, we have attempted to predict the signal to noise from NRIXS for typical applications. To achieve this, a new Atomic Inelastic X-ray Scatter (AXIS) computer code was developed, tested, and its accuracy verified by synchrotron and laboratory measurements.
Author : Winfried Schülke
Publisher : Oxford University Press, USA
ISBN 13 : 0198510179
Total Pages : 606 pages
Book Rating : 4.1/5 (985 download)
Download or read book Electron Dynamics by Inelastic X-Ray Scattering written by Winfried Schülke and published by Oxford University Press, USA. This book was released on 2007-06-21 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work offers the first comprehensive review of experimental methods, theory, and successful applications of synchrotron radiation based on inelastic X-ray scattering spectroscopy, which enables the investigation of electron dynamics in condensed matter (correlated motion and excitation).
