Low-Dimensional Quantum Spin Systems

Dynamical signatures of the one-dimensional deconfined quantum critical.
PDF NMR of low-D quantum spin systems - LNCMI.
Phys. Rev. Lett. 128, 090602 (2022) - Spin Quantum Heat.
Pulse-field Experiments on The Spin-lattice Interaction in Low.
Low-dimensional quantum spin systems - NASA/ADS.
PDF Magnetic light scattering in low-dimensional quantum spin systems.
Jordan-Wigner Fermionization and the Theory of Low-Dimensional Quantum.
Quantum materials | University of Oxford Department of Physics.
[PDF] Orbital order in the low-dimensional quantum spin system TiOCl.
PDF Excitations in Quantum Spin Systems in Low Dimensional Systems.
[cond-mat/0011262] Low-dimensional quantum spin systems.
PDF One-dimensional quantum spin dynamics of Bethe string states.
Electron Spin Resonance and Related Phenomena in Low-Dimensional.
Quantum phase transitions in low-dimensional quantum spin systems with.

Dynamical signatures of the one-dimensional deconfined quantum critical.

Spin-1/2 antiferromagnetic chain [3], the different nature of integer and half-integer spin chains (which are gapped or gapless, respectively) [4, 5], or the connections between high temperature supeconductivity and quantum magnetism in a 2D square lattice [6]. More speciﬁcally, low-dimensional quantum magnets like spin chains or ladders. Low-dimensional quantum spin systems are the subject of intense theoretical and experimental investigation. From a condensed-matter perspective, not only do these systems provide a natural setting for deepening the exploration of many-body quantum coherence properties as demanded by. Quantum dynamics of strongly correlated systems is a challenging problem. Although the low energy fractional excitations of one-dimensional integrable models are often well understood, exploring quantum dynamics in these systems remains challenging in the gapless regime, especially at intermediate and high energies.

PDF NMR of low-D quantum spin systems - LNCMI.

Download Citation | Observing separate spin and charge Fermi seas in a strongly correlated one-dimensional conductor | An electron is usually considered to have only one form of kinetic energy. We study the spin-Peierls (SP) transition of one-dimensional chain polymeric complexes coupled to lattice by means of many-body Green's function theory.... Spin-Peierls transition in low-dimensional quantum spin systems: a Green's function approach Phys Chem Chem Phys. 2009 Dec 28;11(48):11415-23. doi: 10.1039/b913654a. Epub 2009 Oct 20.

Phys. Rev. Lett. 128, 090602 (2022) - Spin Quantum Heat.

Fundamental new paradigms have appeared, such as the Generalized Gibbs Ensembles, and new questions have arisen, that are crucial to understand transport in low-dimensional quantum systems, such as, for instance, about the possible fractal nature of the Drude weight that governs spin conductivity in integrable quantum spin chains. This timely. View Academics in Low Dimensional Quantum Spin System on A. Ergodic dynamics in isolated quantum systems. Such un-usual kind of dynamics is now known to occur when there is an emergence of extensively many conserved quan-tities. This can happen either because of integrability conditions in low-dimensional systems when interactions are nely tuned [5], or more generically because of the.

Pulse-field Experiments on The Spin-lattice Interaction in Low.

Two-dimensional (2D) quantum materials offer a unique platform to explore mesoscopic phenomena driven by interfacial and topological effects. Their tunable electric properties and bidimensional nature enable their integration into sophisticated heterostructures with engineered properties, resulting in the emergence of new exotic phenomena not accessible in other platforms.

Low-dimensional quantum spin systems - NASA/ADS.

Significant quantum fluctuations in low-dimensional spin frustrated systems can give rise to novel quantum phases and exotic quantum phase transitions. [ 1 - 5 ] One substantial difference from the classical systems is that in these quantum spin systems, some phases can not be characterized by conventional order parameters with broken symmetry. Here is a discussion of the state of the art of spin resonance in low dimensional structures, such as two-dimensional electron systems, quantum wires, and quantum dots. Leading scientists report on recent advances and discuss open issues and perspectives. An attractive feature of some low-dimensional magnets is a spin-liquid state defying a long-range order. The liquid may be either gapped or gapless, dependent on the type of quantum statistics.

PDF Magnetic light scattering in low-dimensional quantum spin systems.

SrCu2(BO3)(2) is a two-dimensional dimerized quantum spin system which is close to a quantum critical point. The sound velocity for the longitudinal and transverse acoustic modes shows strong spin. Low-dimensional quantum spin systems are interacting many body systems for which several rigorous results are known. Powerful techniques like the Bethe Ansatz provide exact knowledge of the ground state energy and low-lying excitation spectrum. A large number of compounds exist which can effectively be described as low-dimensional spin systems. Introduction. Low-dimensional magnets have long been a playground for discovering unconventional physics. 1-3 From an experimental point of view, ideal systems have strong magnetic coupling in one- or two-dimensional units, which are well isolated from each other. This includes magnetic chains, which are hosts to spinon quasi-particles that fractionalise electrons by carrying their spin but.

Jordan-Wigner Fermionization and the Theory of Low-Dimensional Quantum.

The fabrication of low-dimensional structures is introduced in Section 2. In Section 3 some general features of quantum phenomena in low dimensions are discussed. The remainder of the chapter is devoted to particular low-dimensional quantum systems, organized by their "dimension." 2. Making Low-Dimensional Quantum Structures. Posted on April 01, 2014 by Web Services Editor. Solid state nuclear spin systems are an excellent platform on which to explore many-body quantum dynamics, as the spins are well-isolated from other degrees of freedom and the Hamiltonian of the system is well-known. We use the tools of magnetic resonance to engineer specific Hamiltonians in both. At lower temperatures there is potential for quantum communication through 1D spin... van der Vliet, H., Theisen, T. et al. Cooling low-dimensional electron systems into the microkelvin.

Quantum materials | University of Oxford Department of Physics.

The 2017 "Advances in Quantum Transport in Low Dimensional Systems" conference, organized by the IOP Nanoscale Physics and Technology Group will be held September 4-5 at University College London, London UK. Key dates are: Abstract submission deadline: 15 June 2017 Early registration deadline: 28 July 2017 Registration deadline: 25 August 2017 More information can be found on the website. Parameters like dimerization, frustration, interchain coupling, and spin-phonon coupling have an important impact on the ground state and the excitations of a quantum spin system. After a brief description of the excitations and the phase diagram of quantum spin systems given in Chapter 1, important low-dimensional spin systems, recent. Low Dimensional Semiconductors. The semiconductor based implementation of a solid-state quantum information processing system, where typically the spin configuration of one or a few electrons constitutes a qubit, can be realized through the formation of an array of quantum dots using electrostatic gates over a quantum well created in a semiconductor heterostructure.

[PDF] Orbital order in the low-dimensional quantum spin system TiOCl.

In this contribution we present and discuss our results for selected low-dimensional compounds such as the homogeneous antiferromagnetic Heisenberg spin chain Cu (II)-bispyrazoldihydroxybenzene, which is a new quasi-1d Cu (II)-coordination polymer, the dimerized spin chain (VO) 2 P 2 O 7, and the plateau systems SrCu 2 (BO 3) 2 and NH 4 CuCl 3.

PDF Excitations in Quantum Spin Systems in Low Dimensional Systems.

When global spin rotational invariance is not broken, the conventional spin-wave theory is inapplicable. To proceed, a modified spin-wave theory for low-dimensional quantum magnetic systems is formulated under the constraint of zero magnetization. This theory can describe disordered state directly, and can be generalized to the ordered phase by identifying the magnetic ordering with the Bose. Excitations in Quantum Spin Systems in Low Dimensional Systems Sriram Shastry UC Santa Cruz Topics: a) Non linear excitations in magnetic systems: 1) From phonons to... This is another kind of spin liquid- a gapped spin liquid aalogous to the Quantum Hall state of Laughlin. Topological term in action. W(k)= J ( Cos[k]+ 1 + ∆), where ∆>0.

[cond-mat/0011262] Low-dimensional quantum spin systems.

Ergodicityfrom Nonergodicityin Quantum Correlations of Low-dimensional Spin R. Prabhu, Aditi Sen(De), and Ujjwal Sen Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, Allahabad 211 019, India.

PDF One-dimensional quantum spin dynamics of Bethe string states.

Mar 01, 2022 · Spin Quantum Heat Engine Quantified by Quantum Steering Wentao Ji, Zihua Chai, Mengqi Wang, Yuhang Guo, Xing Rong, Fazhan Shi, Changliang Ren, Ya Wang, and Jiangfeng Du Phys. Rev. Lett. 128 , 090602 – Published 1 March 2022. We would like to show you a description here but the site won’t allow us.

Electron Spin Resonance and Related Phenomena in Low-Dimensional.

A. A. Zvyagin, Institute for Low Temperature Physics and Engineering, Kharkov, Ukraine. This volume is presented in three parts and it reviews the main features of the theory of one-dimensional quantum insulating magnetic systems. 2010 Hbk ISBN: 978-1-904868-85-9 330pp. Physica E: Low-dimensional systems and nanostructures contains papers and invited review articles on the fundamental and applied aspects of physics in low-dimensional electron systems, in semiconductor heterostructures, oxide interfaces, quantum wells and superlattices, quantum wires and dots, novel quantum states of matter such as topological insulators, and Weyl semimetals. His current research is focused on the theoretical description of mesoscopic and low-dimensional systems, spins in semiconductors, and graphene. Ferromagnetic order of nuclear spins coupled to conduction electrons: A combined effect of electron-electron and spin-orbit interactions. Robert Andrzej Żak, Dmitrii L. Maslov, and Daniel Loss.

Quantum phase transitions in low-dimensional quantum spin systems with.

We report the results of measurements of the dc susceptibility and the 23Na-NMR response of Na2V3O7, a recently synthesized, nonmetallic low dimensional spin system. Our results indicate that, upon reducing the temperature to below 100 K, the V4+ moments are gradually quenched, leaving only one mome.