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Neutron Scattering Study Of Quantum Phase Transitions Inintegral Spin Chains
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Book Synopsis Neutron Scattering Study of Quantum Phase Transitions InIntegral Spin Chains by :
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.
Book Synopsis Neutron Scattering Investigation of Quantum Phase Transitions in the Dimer Spin Systems TlCuCl3 and NH4CuCl3 by : Christian Rüegg
Download or read book Neutron Scattering Investigation of Quantum Phase Transitions in the Dimer Spin Systems TlCuCl3 and NH4CuCl3 written by Christian Rüegg and published by . This book was released on 2005 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutron Scattering Investigation of Quantum Phase Transitions in the Dimer Spin Systems TlCuCl3 and NH4CuCl3 by : Christian Rüegg
Download or read book Neutron Scattering Investigation of Quantum Phase Transitions in the Dimer Spin Systems TlCuCl3 and NH4CuCl3 written by Christian Rüegg and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutron Scattering - Magnetic and Quantum Phenomena by :
Download or read book Neutron Scattering - Magnetic and Quantum Phenomena written by and published by Elsevier. This book was released on 2015-11-29 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron Scattering - Magnetic and Quantum Phenomena provides detailed coverage of the application of neutron scattering in condensed matter research. The book's primary aim is to enable researchers in a particular area to identify the aspects of their work where neutron scattering techniques might contribute, conceive the important experiments to be done, assess what is required to carry them out, write a successful proposal for one of the major user facilities, and perform the experiments under the guidance of the appropriate instrument scientist. An earlier series edited by Kurt Sköld and David L. Price, and published in the 1980s by Academic Press as three volumes in the series Methods of Experimental Physics, was very successful and remained the standard reference in the field for several years. This present work has similar goals, taking into account the advances in experimental techniques over the past quarter-century, for example, neutron reflectivity and spin-echo spectroscopy, and techniques for probing the dynamics of complex materials of technological relevance. This volume complements Price and Fernandez-Alonso (Eds.), Neutron Scattering - Fundamentals published in November 2013. Covers the application of neutron scattering techniques in the study of quantum and magnetic phenomena, including superconductivity, multiferroics, and nanomagnetism Presents up-to-date reviews of recent results, aimed at enabling the reader to identify new opportunities and plan neutron scattering experiments in their own field Provides a good balance between theory and experimental techniques Provides a complement to Price and Fernandez-Alonso (Eds.), Neutron Scattering - Fundamentals published in November 2013
Book Synopsis Neutron Scattering in Condensed Matter Physics by : Albert Furrer
Download or read book Neutron Scattering in Condensed Matter Physics written by Albert Furrer and published by World Scientific Publishing Company. This book was released on 2009-05-22 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron scattering has become a key technique for investigating the properties of materials on an atomic scale. The uniqueness of this method is based on the fact that the wavelength and energy of thermal neutrons ideally match interatomic distances and excitation energies in condensed matter, and thus neutron scattering is able to directly examine the static and dynamic properties of the material. In addition, neutrons carry a magnetic moment, which makes them a unique probe for detecting magnetic phenomena. In this important book, an introduction to the basic principles and instrumental aspects of neutron scattering is provided, and the most important phenomena and materials properties in condensed matter physics are described and exemplified by typical neutron scattering experiments, with emphasis on explaining how the relevant information can be extracted from the measurements.
Book Synopsis Neutron Scattering Study Of Ni-V And Ce(Ni,Cu)Sn Close To The Onset Of Magnetic Order by : Shiva Bhattarai
Download or read book Neutron Scattering Study Of Ni-V And Ce(Ni,Cu)Sn Close To The Onset Of Magnetic Order written by Shiva Bhattarai and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strongly correlated electron systems are at the borderline of competing phases and can be tuned through different ground states by slight modifications. Therefore, they are good examples to study a quantum phase transition (QPT), to reveal how a quantum critical point (QCP) at zero temperature is responsible for the unconventional properties observed at finite temperatures. QPTs are zero-temperature phase transitions, they are more complex and less understood than common phase transitions at finite temperatures. Examples are lacking, especially in the case where disorder is involved. Recent theories predict the possibility of an exotic quantum critical point in itinerant magnets with induced disorder that is accompanied by a quantum Griffiths phase. To explore such unconventional properties in close neighborhood to a magnetic phase, we aim to reveal the relevant quantum critical fluctuations with neutron scattering. We select systems with different magnetic order and choose as tuning parameter chemical substitution to study the effect of disorder. Such experimental study aims to find key elements of a QCP with disorder. The two systems are the ferromagnetic (FM) alloy, Ni-V, tuned by the V-concentration into a paramagnetic phase, and the non-magnetic Kondo semimetal, Ce(Cu,Ni)Sn, tuned by Cu concentration into an antiferromagnetic state. We apply different neutron scattering techniques and simple models to get essential characteristics of the magnetic correlations and fluctuations close to the QCP. Ni-V is a simple FM-alloy with a random atomic distribution that undergoes a quantum phase transition from a ferromagnetic to a paramagnetic state with sufficient substitution of Ni by V. First indication of a quantum Griffiths phase came from magnetization and [mu]SR data, but the scale of the magnetic clusters remained elusive. Optimized small angle neutron scattering (SANS) data on different polycrystalline Ni-V samples close to the QCP finally show a small magnetic scattering response within the FM state. Using full polarization analysis, we discover short-range correlations of order of several nanometers. In addition, the polarized SANS data show evidence of long-range order. The coexistence of magnetic clusters and long-range ordered domains explain the unusual properties of this disordered FM with a QCP. These results agree with the expectations of a disordered QCP with a quantum Griffith phase. The non-magnetic anisotropic Kondo insulator, CeNiSn, presents a rather unique magnetic excitation spectrum with gaps. Cu doping leads to an antiferromagnetic ordered state with a small magnetic moment. We collected the first inelastic neutron scattering data of a single crystalline sample with Cu concentration at the onset of the magnetic order and revealed the magnetic excitation spectrum at a specific wave vector. It does not show a gap anymore, but magnetic order. In addition, we identify a fluctuation spectrum, including one-dimensional critical magnetic fluctuations. These first data already shed some light on the complex behavior of this Kondo semimetal driven by anisotropic hybridization and disorder. Overall these neutron scattering data reveal relevant quantum fluctuations close to onset of magnetic order that help to characterize the nature of the transition
Book Synopsis Neutron scattering studies on phase transitions in ... [CDNDCuCl] and ... [MnClHO] by : Josephus J. Steijger
Download or read book Neutron scattering studies on phase transitions in ... [CDNDCuCl] and ... [MnClHO] written by Josephus J. Steijger and published by . This book was released on 1982 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutron Scattering with a Triple-Axis Spectrometer by : Gen Shirane
Download or read book Neutron Scattering with a Triple-Axis Spectrometer written by Gen Shirane and published by Cambridge University Press. This book was released on 2002-02-21 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron scattering is an extremely powerful tool in the study of elemental excitations in condensed matter. This book provides a practical guide to basic techniques using a triple-axis spectrometer. Introductory chapters summarize useful scattering formulas and describe the components of a spectrometer, followed by a comprehensive discussion of the resolution function and focusing effects. Later sections include simple examples of phonon and magnon measurements, and an analysis of spurious effects in both inelastic and elastic measurements, and how to avoid them. Finally, polarization analysis techniques and their applications are covered. This guide will allow graduate students and experienced researchers new to neutron scattering to make the most efficient use of their experimental time.
Book Synopsis Neutron Scattering Studies on Phase Transitions in CD3ND3 2CuCI4 and MnCI24H2O by : Josephus Johannes Maria Steijger
Download or read book Neutron Scattering Studies on Phase Transitions in CD3ND3 2CuCI4 and MnCI24H2O written by Josephus Johannes Maria Steijger and published by . This book was released on with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Principles of Neutron Scattering from Condensed Matter by :
Download or read book Principles of Neutron Scattering from Condensed Matter written by and published by Oxford University Press, USA. This book was released on 2020-07-09 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron scattering is arguably the most powerful technique available for looking inside materials and seeing what the atoms are doing. This textbook provides a comprehensive and up-to-date account of the many different ways neutrons are being used to investigate the behaviour of atoms and molecules in bulk matter. It is written in a pedagogical style, and includes many examples and exercises. Every year, thousands of experiments are performed at neutron scattering facilities around the world, exploring phenomena in physics, chemistry, materials science, as well as in interdisciplinary areas such as biology, materials engineering, and cultural heritage. This book fulfils a need for a modern and pedagogical treatment of the principles behind the various different neutron techniques, in order to provide scientists with the essential formal tools to design their experiments and interpret the results. The book will be of particular interest to researchers using neutrons to study the atomic-scale structure and dynamics in crystalline solids, simple liquids and molecular fluids by diffraction techniques, including small-angle scattering and reflectometry, and by spectroscopic methods, ranging from conventional techniques for inelastic and quasielastic scattering to neutron spin-echo and Compton scattering. A comprehensive treatment of magnetic neutron scattering is given, including the many and diverse applications of polarized neutrons.
Book Synopsis Neutron Scattering and Transport Studies of Quantum Materials by : Heda Zhang
Download or read book Neutron Scattering and Transport Studies of Quantum Materials written by Heda Zhang and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum material is an multi-disciplinary research topic that continues to thrive in recent years. The term Quantum material covers all systems which demonstrate physical phenomena beyond the scope of single-particle, semi-classical/quantum theory. Among many sub-fields of quantum materials, topological systems and strongly correlated systems are two topics which have receive growing attention from the scientific community.We begin with a discussion on a van der Waals magnet VI3 in chapter three. VI3 hosts ferromagnetism on a honeycomb lattice, which was one of the proposed models for topological magnon bands. There have been ample theoretical studies on ferromagnetic honeycomb lattice. However, there has not been any physical realization of such model. In our study, we show that the is a strong anomalous thermal Hall effect in VI3, the underlying mechanism of which is the non-trivial topological nature of the magnon bands.In chapter four, we discuss our transport studies on some magnetic topological metals. The non-zero Berry curvature in the reciprocal space of topological metals can lead to anomalous transverse conductivities (ÎðA, ϳA, ÎłA) in the system. We found large anomalous transverse conductivities in TbMn6Sn6 and verified its intrinsic nature through first-principle calculations. Furthermore, we have found large exchange-bias behavior in TbMn6Sn6, which renders it as a promising system for anomalous Nernst effect based thermoelectric device. We will also discuss the topological Nernst effect observed in Fe3Sn2, which is potentially due to the Skyrmion bubble phase revealed by the Lorentz transmission electron microscopic studies.In chapter five, we discuss our inelastic neutron scattering study on a unique quantum spin chain system in Cu2(OH)3Br. The system hosts alternating ferromagnetic and anti-ferromagnetic spin chains with finite inter-chain couplings. This allows for the coexistence and interactions between magnons and spinons.
Book Synopsis Investigation of Quantum Phase Transitions in Ising-like Systems, by Torque Magnetometry and Neutron Scattering by : Sara Eisenhardt
Download or read book Investigation of Quantum Phase Transitions in Ising-like Systems, by Torque Magnetometry and Neutron Scattering written by Sara Eisenhardt and published by . This book was released on 2010 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutron Scattering Studies on Phase Transitions in (CD 3 ND 3 ) 2 CuCl 4 and MnCl 2 .4H 2 O by : Josephus Johannes Maria Steyger
Download or read book Neutron Scattering Studies on Phase Transitions in (CD 3 ND 3 ) 2 CuCl 4 and MnCl 2 .4H 2 O written by Josephus Johannes Maria Steyger and published by . This book was released on 1982 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutron Scattering Studies of Two Magnetic Phase Transitions by : Radu Coldea
Download or read book Neutron Scattering Studies of Two Magnetic Phase Transitions written by Radu Coldea and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutron Scattering Studies of Structural Phase Transitions by : W. Bührer
Download or read book Neutron Scattering Studies of Structural Phase Transitions written by W. Bührer and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutron Scattering Techniques in the Study of Phase Transitions by : Ronald Benjamin Rogge
Download or read book Neutron Scattering Techniques in the Study of Phase Transitions written by Ronald Benjamin Rogge and published by . This book was released on 1994 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phase Transitions and Neutron Scattering by :
Download or read book Phase Transitions and Neutron Scattering written by and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review is given of recent advances in neutron scattering studies of solid state physics. The author has selected the study of a structural phase transition as the best example to demonstrate the power of neutron scattering techniques. Since energy analysis is relatively easy, the dynamical aspects of a transition can be elucidated by the neutron probe. He will discuss in some detail current experiments on the 100K transition in SrTiO3, the crystal which has been the paradigm of neutron studies of phase transitions for many years. This new experiment attempts to clarify the relation between the neutron central peak, observed in energy scans, and the two length scales observed in recent x-ray diffraction studies where only scans in momentum space are possible.
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