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Resonant Inelastic X Ray Scattering And X Ray Emission Spectroscopy Studies Of Iron Pnictides
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Book Synopsis Resonant Inelastic X-ray Scattering and X-ray Emission Spectroscopy Studies of Iron Pnictides by : Jonathan Pelliciari
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:
Book Synopsis X-ray Spectroscopy Studies of Iridates and Iron Based Superconductors by : Hlynur Gretarsson
Download or read book X-ray Spectroscopy Studies of Iridates and Iron Based Superconductors written by Hlynur Gretarsson and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Resonant Inelastic X-ray Scattering Spectroscopy by : Sarah Hobbs
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 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research focuses on the development of Resonant Inelastic X-ray Scattering spectroscopy (RIXS) as a tool in homogeneous catalysis by looking at 3d transition metal compounds and specifically Cr(salen) epoxidation catalysts. Previous studies have demonstrated the sensitivity of transition metal K-edge X-ray absorption pre-edge and edge features to their chemical environment, but the exact origins are unassigned. The aim of this study is to bring together a collection of complementary, and some novel, X-ray techniques to assign these features and obtain more detailed structural and electronic information on the systems under investigation. Novel high energy resolution data on transition metal complexes have been obtained and the pre-edge region has been simulated with the FEFF9 multiple scattering code. The increase in spectral structure compared to normal XANES allows for a more detailed analysis and as such, provides detailed insights in the electronic properties. L-edge XAS data obtained using soft X-rays enabled the determination of crystal field parameters, which were compared with other X-ray (RIXS) and optical absorption techniques. The novel RIXS experiments provide L and K-edge spectra unaffected by lifetime broadening or background from the main absorption edge. 2D images of X-ray emission as a function of absorption are obtained, revealing the relationship between them and providing direct and detailed information on the presence and position of molecular orbitals. These 1s2p RIXS experiments make use of hard X-rays enabling in-situ experiments, which are important in the field of catalysis, making it a promising tool to monitor the changing electronics of the metal centre as well as ligand coordination during the catalytic process. Whereas the electronic differences on the Cr metal as a function of salen ligand are not revealed by the current RIXS experiments, which is likely due to resolution issues, new preliminary insights in the different catalytic Cr intermediates of the epoxidation reaction have been obtained.
Book Synopsis Theory of Inelastic Scattering and Absorption of X-rays by : Michel van Veenendaal
Download or read book Theory of Inelastic Scattering and Absorption of X-rays written by Michel van Veenendaal and published by Cambridge University Press. This book was released on 2015-01-26 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive, self-contained guide to X-ray spectroscopy will equip you with everything you need to begin extracting the maximum amount of information available from X-ray spectra. Key topics such as the interaction between X-rays and matter, the basic theory of spectroscopy, and selection and sum rules, are introduced from the ground up, providing a solid theoretical grounding. The book also introduces core underlying concepts such as atomic structure, solid-state effects, the fundamentals of tensor algebra and group theory, many-body interactions, scattering theory, and response functions, placing spectroscopy within a broader conceptual framework, and encouraging a deep understanding of this essential theoretical background. Suitable for graduate students, researchers, materials scientists and optical engineers, this is the definitive guide to the theory behind this powerful and widely used technique.
Book Synopsis INELASTIC X-RAY SCATTERING AT ULTRAHIGH PRESSURES. by :
Download or read book INELASTIC X-RAY SCATTERING AT ULTRAHIGH PRESSURES. written by and published by . This book was released on 2000 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inelastic x-ray scattering (IXS) provides high-pressure research with an arsenal of analytical capabilities for key measurements that were previously unattainable, and high pressure research provides IXS with numerous applications where the technique has unique advantages over other methods. High-pressure investigations can now be conducted using non-resonant IXS, resonant IXS, nuclear resonant IXS, and x-ray emission spectroscopy with energy resolutions of 100 meV to 1 eV for electronic transitions and 1 to 10 meV for phonon studies. By pressure-tuning materials over a wide range, we are able to investigate fundamental physics of electron gases, strongly correlated electron systems, high-energy electronic excitations, and phonons in energy and momentum space. The results will have a profound influence on materials applications as well as providing basic information for understanding the deep interior of the Earth and other planets.
Book Synopsis Resonant X-Ray Scattering in Correlated Systems by : Youichi Murakami
Download or read book Resonant X-Ray Scattering in Correlated Systems written by Youichi Murakami and published by Springer. This book was released on 2016-12-27 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research and its outcomes presented here is devoted to the use of x-ray scattering to study correlated electron systems and magnetism. Different x-ray based methods are provided to analyze three dimensional electron systems and the structure of transition-metal oxides. Finally the observation of multipole orderings with x-ray diffraction is shown.
Book Synopsis Theoretical Approach to Resonant Inelastic X-ray Scattering in Iron-based Superconductors at the Energy Scale of the Superconducting Gap by :
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.
Book Synopsis X-ray Spectroscopic Studies of Highly Covalent Iron Centers by : James Jie Yan
Download or read book X-ray Spectroscopic Studies of Highly Covalent Iron Centers written by James Jie Yan and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Resonant Inelastic X-ray Scattering Study of Two Lamellar Copper Oxides by : Li Lu
Download or read book Resonant Inelastic X-ray Scattering Study of Two Lamellar Copper Oxides written by Li Lu and published by . This book was released on 2006 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inelastic Scattering of X-Rays with Very High Energy Resolution by : Eberhard Burkel
Download or read book Inelastic Scattering of X-Rays with Very High Energy Resolution written by Eberhard Burkel and published by Springer. This book was released on 2006-04-11 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inelastic scattering of X-rays with very high energy resolution has finally become possible thanks to a new generation of high-intensity X-ray sources. This development marks the end to the traditional belief that low energy excitations like lattice vibrations cannot be resolved directly with X-rays: Inelastic scattering experiments allow to observe directly the small energy shifts of the photons. Studies of lattice vibrations, of excitations in molecular crystals, of collective excitations in liquids and electronic excitations in crystals demonstrating the broad applicability and power of this new technology are discussed in this book. The progress in this field opens up fantastic new research areas not only in physics but also in other disciplines such as materials science,biology and chemistry.
Book Synopsis X-ray Absorption Spectroscopy with an X-ray Free Electron Laser by : Daniel Jeremy Higley
Download or read book X-ray Absorption Spectroscopy with an X-ray Free Electron Laser written by Daniel Jeremy Higley and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray absorption spectroscopy provides element-specific information about local electronic structure through the photon energy and polarization dependence of the X-ray absorption coefficient in the vicinity of core-to-valence resonance energies. When using circular polarization, this technique also provides magnetic sensitivity through X-ray magnetic circular dichroism. With the advent of X-ray free electron lasers, it has become possible to perform high resolution X-ray absorption spectroscopy studies with femtosecond time resolution and intensities high enough that nonlinear X-ray effects are important. In this dissertation, we describe our development and use of X-ray magnetic circular dichroism absorption spectroscopy at the Linac Coherent Light Source X-ray free electron laser at SLAC. After describing the implementation of this technique, we briefly describe its application to studies of ultrafast optically-induced magnetic and electronic dynamics in a few magnetic metals of current technological interest. Next, we present X-ray-intensity-dependent measurements of X-ray absorption near the Co L3 edge of Co/Pd magnetic multilayers. The polarization-dependent intensity of the Co L3 absorption resonance changes significantly with increasing incident X-ray flux. These changes depend on the pulse length and photon energy content of the incident X-ray pulses. For monochromatic 40 fs duration X-ray pulses with fluences near the sample melting threshold, the fluence-dependent changes in resonant X-ray asborption are attributed to decreased population of the Co valence states below the Fermi level, and increased population of the Co valence states above the Fermi level. They can be accounted for by reshuffling of electrons from below the Fermi level to above the Fermi level caused by inelastic scattering of photoelectrons and Auger electrons. In this experiment, we also observe a decrease of the X-ray magnetic circular dichroism strength with increasing X-ray intensity, which can be attributed to X-ray-induced demagnetization within the X-ray pulse duration. With wide bandwidth X-ray pulses of about 5 fs and 25 fs duration and fluences many times the sample melting threshold, we observe even stronger fluence-dependent X-ray absorption changes. Some of the observed changes can be assigned to stimulated resonant inelastic X-ray scattering. This constitutes the first observation of this effect in a solid. Our studies pave the way for more sophisticated nonlinear X-ray measurements of solids which are envisioned to provide new insight into their properties.
Book Synopsis Development and Application of Resonant Inelastic X-ray Scattering Spectroscopy in Inorganic Chemistry by : Anselm Wolfgang Hahn
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:
Book Synopsis Resonant Inelastic X-ray Scattering Studies of Elementary Excitations by : Lucas Johannes Peter Ament
Download or read book Resonant Inelastic X-ray Scattering Studies of Elementary Excitations written by Lucas Johannes Peter Ament and published by . This book was released on 2010 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Resonant Anomalous X-ray Scattering by : G. Materlik
Download or read book Resonant Anomalous X-ray Scattering written by G. Materlik and published by North Holland. This book was released on 1994 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardbound. The collected articles in this book written by recognized experts in the field explore the theoretical and experimental insights and applications of the rapidly expanding science of x-ray resonant interactions. The variety of papers presented reflects the theoretical and experimental progress made possible with tunable, polarized and highly brilliant synchrotron radiation sources. In a rapidly changing field this book provides a single selected reference source on the present understanding of x-ray resonance scattering and its many applications. A detailed subject index provides easy access to the many topics covered by the authors who list over 1000 references.
Book Synopsis RESONANT INELASTIC X-RAY SCATTERING FROM TRANSITION METAL OXIDES. by :
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.
Book Synopsis Stimulated Resonant Inelastic X-ray Scattering in Transition Metal Systems by : Markus Hantschmann
Download or read book Stimulated Resonant Inelastic X-ray Scattering in Transition Metal Systems written by Markus Hantschmann and published by . This book was released on 2023* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the implementation of intense, short pulsed light sources throughout the last years, the powerful technique of resonant inelastic X-ray scattering (RIXS) became feasible for a wide range of experiments within femtosecond dynamics in correlated materials and molecules. In this thesis I investigate the potential to bring RIXS into the fluence regime of nonlinear X-ray-matter interactions, especially focusing on the impact of stimulated scattering on RIXS in transition metal systems in a transmission spectroscopy geometry around transition metal L-edges. After presenting the RIXS toolbox and the capabilities of free electron laser light sources for ultrafast intense X-ray experiments, the thesis explores an experiment designed to understand the impact of stimulated scattering on diffraction and direct beam transmission spectroscopy on a CoPd multilayer system. The experiments require short X-ray pulses that can only be generated at free electron lasers (FEL). Here the pulses are not only short, but also very intense, which opens ...
Book Synopsis Nematicity in iron-based superconductors by : Qisi Wang
Download or read book Nematicity in iron-based superconductors written by Qisi Wang and published by Frontiers Media SA. This book was released on 2023-02-15 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
