Energy dynamics in a generalized compass chain

Abstract

We investigate the energy dynamics in a generalized compass chain under an external magnetic field. We show that the energy current operators act on three contiguous sites in the absence of the magnetic field, and they are incorporated with inhomogenous Dzyaloshinskii-Moriya interactions in the presence of the magnetic field. These complex interactions remain the Hamiltonian be an exactly solvable spin model. We study the effects of the three-site interactions and the Dzyaloshinskii-Moriya interactions on the energy spectra and phase diagram. The results have revealed that the energy current of the pristine quantum compass model is conserved due to the associated intermediate symmetries, and for other general cases such characteristic does not exist.

8 pages, 8 figures, in press in J. Phys. Condens. Matter

References in corpus (15)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Spin current and magneto-electric effect in non-collinear magnets
• Quantum Simulation of Antiferromagnetic Spin Chains in an Optical Lattice
• On the Origin of Zigzag Magnetic Order in Iridium Oxide Na2IrO3
• Topological characterization of quantum phase transitions in a S=1/2 spin model
• Hidden symmetries of the extended Kitaev-Heisenberg model: Implications for honeycomb lattice iridates A2IrO3
• Spin model of magnetostrictions in multiferroic Mn perovskites
• Spin and energy currents in integrable and nonintegrable spin-1/2 chains: A typicality approach to real-time autocorrelations
• Dynamic properties of the spin-1/2 XY chain with three-site interactions
• Magnetocaloric effect in spin-1/2 $XX$ chains with three-spin interactions
• Quantum phase transitions in exactly solvable one-dimensional compass models
• Exact treatment of magnetism-driven ferroelectricity in the one-dimensional compass model
• Exact solution of a spin-1/2 $XX$ chain with three-site interactions in a random transverse field: Influence of randomness on quantum phase transition
• Locally tunable disorder and entanglement in the one-dimensional plaquette orbital model

Cited by in corpus (2)

• Emergent phases in a compass chain with multisite interactions
• Quantum phase transitions of a generalized compass chain with staggered Dzyaloshinskii-Moriya interaction