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Author : Nikolay Tsyrulin
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.:/5 (731 download)
Download or read book Neutron Scattering Studies of Low-dimensional Quantum Spin Systems written by Nikolay Tsyrulin and published by . This book was released on 2010 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stefan Paul Gosuly
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (116 download)
Download or read book Neutron Scattering Studies of Low-dimensional Quantum Spin Systems written by Stefan Paul Gosuly and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : S. P. Gosuly
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (112 download)
Download or read book Neutron Scattering Studies of Low-dimensional Quantum Spin Systems written by S. P. Gosuly and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Tom Huberman
Publisher :
ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.:/5 (644 download)
Download or read book Neutron Scattering Studies and Classical Simulations on Low-dimensional Spin Systems written by Tom Huberman and published by . This book was released on 2004 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kazuhisa Kakurai
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (248 download)
Download or read book Neutron Scattering Studies on Quantum Spin Systems written by Kazuhisa Kakurai and published by . This book was released on 2000 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INTERACTING QUANTUM SPIN CHAINS. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A brief review of recent advances in neutron scattering studies of low-dimensional quantum magnets is followed by a particular example. The separation of single-particle and continuum states in the weakly-coupled S = l/2 chains system BaCu2Si2O-- is described in some detail.
Author : Chiron Jeeb Mukherjee
Publisher :
ISBN 13 :
Total Pages : 418 pages
Book Rating : 4.:/5 (749 download)
Download or read book Neutron Scattering Studies on Low-dimensional Quantum Magnets written by Chiron Jeeb Mukherjee and published by . This book was released on 2005 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 211 pages
Book Rating : 4.:/5 (1 download)
Download or read book Neutron Scattering Studies of Low Dimensional Magnetic Systems written by and published by . This book was released on 2017 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. Baeriswyl
Publisher : Springer Science & Business Media
ISBN 13 : 1402034636
Total Pages : 441 pages
Book Rating : 4.4/5 (2 download)
Download or read book Strong Interactions in Low Dimensions written by D. Baeriswyl and published by Springer Science & Business Media. This book was released on 2007-09-29 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an attempt to convey the colorful facets of condensed matter systems with reduced dimensionality. Some of the specific features predicted for interacting one-dimensional electron systems, such as charge- and spin-density waves, have been observed in many quasi-one-dimensional materials. The two-dimensional world is even richer: besides d-wave superconductivity and the Quantum Hall Effect - perhaps the most spectacular phases explored during the last two decades - many collective charge and spin states have captured the interest of researchers, such as charge stripes or spontaneously generated circulating currents. Recent years have witnessed important progress in material preparation, measurement techniques and theoretical methods. Today larger and better samples, higher flux for neutron beams, advanced light sources, better resolution in electron spectroscopy, new computational algorithms, and the development of field-theoretical approaches allow an in-depth analysis of the complex many-body behaviour of low-dimensional materials. The epoch when simple mean-field arguments were sufficient for describing the gross features observed experimentally is definitely over. The Editors' aim is to thoroughly explain a number of selected topics: the application of dynamical probes, such as neutron scattering, optical absorption and photoemission, as well as transport studies, both electrical and thermal. Some of the more theoretical chapters are directly relevant for experiments, such as optical spectroscopy, transport in one-dimensional models, and the phenomenology of charge inhomogeneities in layered materials, while others discuss more general topics and methods, for example the concept of a Luttinger liquid and bosonization, or duality transformations, both promising tools for treating strongly interacting many-body systems.
Author : Hung-the Diep
Publisher : World Scientific
ISBN 13 : 9814440752
Total Pages : 644 pages
Book Rating : 4.8/5 (144 download)
Download or read book Frustrated Spin Systems (2nd Edition) written by Hung-the Diep and published by World Scientific. This book was released on 2013-03-25 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers all principal aspects of currently investigated frustrated systems, from exactly solved frustrated models to real experimental frustrated systems, going through renormalization group treatment, Monte Carlo investigation of frustrated classical Ising and vector spin models, low-dimensional systems, spin ice and quantum spin glass. The reader can — within a single book — obtain a global view of the current research development in the field of frustrated systems.This new edition is updated with recent theoretical, numerical and experimental developments in the field of frustrated spin systems. The first edition of the book appeared in 2005. In this edition, more recent works until 2012 are reviewed. It contains nine chapters written by researchers who have actively contributed to the field. Many results are from recent works of the authors.The book is intended for postgraduate students as well as researchers in statistical physics, magnetism, materials science and various domains where real systems can be described with the spin language. Explicit demonstrations of formulas and full arguments leading to important results are given where it is possible to do so.
Author : Gheorghe Lucian Pascut
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (931 download)
Download or read book Neutron and Resonant X-ray Scattering Studies of Low Dimensional Quantum Magnets written by Gheorghe Lucian Pascut and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutron Scattering Studies of Low Dimensional Magnetic Systems written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the last few years, neutron scattering studies have been carried out on several new prototypes of low dimensional (2D or 1D) magnetic systems. Discussions of a 2D Ising antiferromagnet K2CoF4 (Ikeda and Hirakawa) are presented along with neutron scattering results on K2NiF4, Rb2Mn0.5Ni0.5F4, and Rb2Mn0.5Mg0.5F4. Also reported are new results of high resolution of (CD3)4N MnCl3 (TMMC). Recent neutron experiments at Brookhaven have been carried out in collaboration with J. Als-Nielsen (Riso), R.A. Cowley (Edinburgh), and H.J. Guggenheim (Bell Laboratories).
Author : Pierre Bouillot
Publisher : Springer Science & Business Media
ISBN 13 : 3642338089
Total Pages : 104 pages
Book Rating : 4.6/5 (423 download)
Download or read book Statics and Dynamics of Weakly Coupled Antiferromagnetic Spin-1/2 Ladders in a Magnetic Field written by Pierre Bouillot and published by Springer Science & Business Media. This book was released on 2012-12-14 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis shows how a combination of analytic and numerical techniques, such as a time dependent and finite temperature Density Matrix Renormalization Group (DMRG) technique, can be used to obtain the physical properties of low dimensional quantum magnets with an unprecedented level of accuracy. A comparison between the theory and experiment then enables these systems to be used as quantum simulators; for example, to test various generic properties of low dimensional systems such as Luttinger liquid physics, the paradigm of one dimensional interacting quantum systems. Application of these techniques to a material made of weakly coupled ladders (BPCB) allowed the first quantitative test of Luttinger liquids. In addition, other physical quantities (magnetization, specific heat etc.), and more remarkably the spins-spin correlations – directly measurable in neutron scattering experiments – were in excellent agreement with the observed quantities. We thus now have tools to quantitatiively assess the dynamics for this class of quantum systems.
Author :
Publisher :
ISBN 13 :
Total Pages : 1007 pages
Book Rating : 4.:/5 (727 download)
Download or read book Neutron Scattering Study of Quantum Phase Transitions InIntegral Spin Chains written by and published by . This book was released on 2006 with total page 1007 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quite a few low-dimensional magnets are quantum-disordered 'spin liquids' with a characteristic gap in the magnetic excitation spectrum. Among these are antiferromagnetic chains of integer quantum spins. Their generic feature are long-lived massive (gapped) excitations (magnons) that are subject to Zeeman splitting in external magnetic fields. The gap in one of the magnon branches decreases with field, driving a soft-mode quantum phase transition. The system then enters a qualitatively new high-field phase. The actual properties at high fields, particularly the spin dynamics, critically depend on the system under consideration. Recent neutron scattering studies of organometallic polymer crystals NDMAP (Haldane spin chains with anisotropy) and NTENP (dimerized S = 1 chains) revealed rich and unique physics.
Author : A. C. Walters
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (829 download)
Download or read book Using X-ray and Neutron Scattering to Study the Dynamics of Low-dimensional Systems written by A. C. Walters and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The theoretical and experimental study of low-dimensional systems has dominated much of modern condensed matter physics. Such systems present a range of different phenomena which are not observed in more isotropic, three-dimensional materials. This thesis constitutes the study of the excitations of two types of low-dimensional system: the magnetic excitations in the one-dimensional S = 1/2 antiferromagnetic chain compound Sr2CuO3 as studied using inelastic neutron scattering, and the phonons in quasi-two-dimensional graphite intercalation compounds CaC6 and BaC6 studied using inelastic X-ray scattering. Initially an introduction to the vast field of low-dimensional systems is provided, followed by a description of the neutron and X-ray scattering technique. Spinon excitations in Sr2CuO3 have been measured up to ≈ 600 meV, and are found to be well-described by the Heisenberg model. A new version of the magnetic form factor for Cu2+ in Sr2CuO3 provides an explanation for the considerable reduction in the measured inelastic neutron scattering intensity, which may have significant consequences for past and future work on other related materials. The phonons in superconducting CaC6 (Tc = 11.5 K) are found to be in reasonable agreement with Density Functional Perturbation Theory calculations, but the measured dispersions in non-superconducting BaC6 are significantly different to those predicted. No direct evidence for electron-phonon coupling is found in either compound. It is concluded that the X-ray data supports the validity of the theoretical description of CaC6, but the use of significantly inaccurate lattice parameters for BaC6 in the calculation may provide an explanation of the poor agreement in this case.
Author : Wei He (Researcher in materials science)
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)
Download or read book Scattering Studies of Magnetic and Charge Correlations in Two-dimensional Quantum Magnets written by Wei He (Researcher in materials science) and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of quantum magnets in two-dimensional systems is a forefront field in both materials science and condensed matter physics research. Such materials not only provide rich platforms for potential applications of novel materials but also further our understanding of basic physics. Neutron and x-ray scattering are powerful tools to explore the magnetic and charge correlations in these materials. This thesis describes the experimental investigation of two model systems in bulk crystalline form, one with a two-dimensional kagome lattice and one with a two-dimensional square lattice, both consisting of Cu2+ ions with spin-1/2. Strong quantum fluctuations give competing ground states or phases in both systems. Recently, barlowite Cu4(OH)6FBr has attracted much attention as the parent compound of a new kagome quantum spin liquid candidate. Our new synthesis method produced large single crystals of a new variant of barlowite, which has a higher symmetry space group compared to the previously reported one. Our elastic magnetic neutron scattering measurements reveal that the magnetic ground state of the new high-symmetry barlowite at low temperatures has a special pinwheel q = 0 magnetic order. In the intermediate temperatures, our numerical calculations and inelastic neutron scattering indicate that the kagome spins are in a potential pinwheel valence bond crystal state. Both of the two ground states are in close proximity to the long-sought quantum spin liquid state. The second part of my thesis is focused on the spin and charge correlations in high-Tc cuprate superconductors. Cuprate materials display intriguing physical phenomena due to the coexistence of various phases, which may interact with the superconductivity. The La-based family is a canonical example where both the spin and charge correlations could form "stripes". Magnetic neutron scattering reveals a rather surprising feature of the spin stripes in the model material La1.88Sr0.12CuO4: regardless of whether they are static or fluctuating, these stripes are always tilted from the high-symmetry direction of underlying lattices. Comparison with numerical simulations reveals the important role of the next-nearest neighbor electron hopping. Resonant soft x-ray scattering measurements offer important information about the charge order in another cuprate material stage-6 O-doped La2CuO4+y. By tuning both temperature and the dopant disorder level, we clearly observe two types of charge orders with distinct correlation lengths and behaviors at low temperatures. A coherent picture based on microscopic phase separation is proposed to explain the relationship between charge and spin orders with superconductivity in these materials.
Author : Elisa Maria da Silva Wheeler
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (234 download)
Download or read book Neutron Scattering from Low-dimensional Quantum Magnets written by Elisa Maria da Silva Wheeler and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
