Corpus ID: 236134158

Multimagnon dynamics and thermalization in the $S=1$ easy-axis ferromagnetic chain

  title={Multimagnon dynamics and thermalization in the \$S=1\$ easy-axis ferromagnetic chain},
  author={Prakash C. Sharma and Kyungmin Lee and Hitesh J. Changlani},
Quasiparticles are physically motivated mathematical constructs for simplifying the seemingly complicated many-body description of solids. A complete understanding of their dynamics and the nature of the effective interactions between them provides rich information on real material properties at the microscopic level. In this work, we explore the dynamics and interactions of magnon quasiparticles in a ferromagnetic spin-1 Heisenberg chain with easy-axis onsite anisotropy, a model relevant for… Expand


Tunable Magnon Interactions in a Ferromagnetic Spin-1 Chain.
It is shown how magnetic field strength and direction may be used to directly tune the sign of the magnon-magnon interaction, which has no analog in the more widely studied spin-1/2 systems. Expand
Observation of 4- and 6-magnon bound-states in the spin-anisotropic frustrated antiferromagnet FeI$_2$.
Spin-waves e.g. magnons are the conventional elementary excitations of ordered magnets. However, other possibilities exist. For instance, magnon bound-states can arise due to attractive magnon-magnonExpand
Unusual phases in quantum spin-1 systems
Quantum spin-1 systems with competing quadratic and biquadratic exchange interactions may be realized in phases that cannot be accounted for by the standard spin-wave theory. A more flexibleExpand
Fractional spinon excitations in the quantum Heisenberg antiferromagnetic chain
One of the simplest quantum many-body systems is the spin-1/2 Heisenberg antiferromagnetic chain, a linear array of interacting magnetic moments. Its exact ground state is a macroscopic singletExpand
Spin-lattice Coupling and the Emergence of the Trimerized Phase in the S=1 Kagome Antiferromagnet Na_{2}Ti_{3}Cl_{8}.
It is shown that lattice effects can be necessary to understand the magnetism in frustrated magnetic compounds and surmise that Na_{2}Ti_{3}Cl_{8} is a compound that cannot be understood from only electronic or only lattice Hamiltonians, very much like VO_{2}. Expand
Macroscopically Degenerate Exactly Solvable Point in the Spin-1/2 Kagome Quantum Antiferromagnet.
This work reports the discovery of a special quantum macroscopically degenerate point in the XXZ model on the spin-1/2 kagome quantum antiferromagnet for the ratio of Ising toantiferromagnetic transverse coupling J_{z}/J=-1/3 and identifies five phases near this point including both spin-liquid and broken-symmetry phases. Expand
Emergent SU(2) Dynamics and Perfect Quantum Many-Body Scars.
A weak quasilocal deformation of the Rydberg-blockaded Hamiltonian is constructed, which makes the revivals virtually perfect and suggests the existence of an underlying nonintegrable Hamiltonian which supports an emergent SU(2)-spin dynamics within a small subspace of the many-body Hilbert space. Expand
Continuum of quantum fluctuations in a three-dimensional S = 1 Heisenberg magnet
Conventional crystalline magnets are characterized by symmetry breaking and normal modes of excitation called magnons, with quantized angular momentum ħ. Neutron scattering correspondingly featuresExpand
Motif magnetism and quantum many-body scars
We generally expect quantum systems to thermalize and satisfy the eigenstate thermalization hypothesis (ETH), which states that finite energy density eigenstates are thermal. However, some systems,Expand
We describe the nature of charge transport at non-zero temperatures (T ) above the two-dimensional (d) superuid-insulator quantum critical point. We argue that the transport is characterized byExpand