One-Dimensional S=1 Spin-Orbital Model with Uniaxial Single-Ion Anisotropy

Abstract

We investigate ground-state properties of a one-dimensional S=1 spin-orbital model with or without uniaxial single-ion anisotropy. By means of the density matrix renormalization group method, we compute the ground-state energy, the magnetization curves and the correlation functions. We discuss how the ground-state properties depend on the two exchange couplings for orbital and spin sectors. The phase diagram obtained is compared with that for the S=1/2 model. We also address the effect of uniaxial single-ion anisotropy.

arXiv comment7 pages, 10 figures, accepted for publication in J. Phys. Soc. Jpn

References in corpus (11)

• Spin Order due to Orbital Fluctuations: Cubic Vanadates
• Magnetic neutron scattering study of YVO3: Evidence for an orbital Peierls state
• Alternating Spin and Orbital Dimerization in Strong-coupling Two-band Models
• SU(4) spin-orbit critical state in one dimension
• Phase diagram of a 1 dimensional spin-orbital model
• Dimerization versus Orbital Moment Ordering in the Mott insulator YVO${}_3$
• Numerical Study of the One-Dimensional Spin-Orbit Coupled System with SU(2)$\otimes$SU(2) Symmetry
• Entropy Driven Dimerization in a One-Dimensional Spin-Orbital Model
• Theory for high spin systems with orbital degeneracy
• Ground-State Phase Diagram of Frustrated Antiferromagnetic S=1 Chain with Uniaxial Single-Ion-Type Anisotropy
• Quantum Phase Transitions in the One-Dimensional S=1 Spin-Orbital Model: Implications for Cubic Vanadates

Cited by in corpus (3)

• Von Neumann Entropy Spectra and Entangled Excitations in Spin-Orbital Models
• Magnetic excitations in one-dimensional spin-orbital models
• Spin-orbital entanglement near quantum phase transitions