Thermodynamics of symmetric spin--orbital model: One- and two-dimensional cases

Abstract

The specific heat and susceptibilities for the two- and one-dimensional spin--orbital models are calculated in the framework of a spherically symmetric self-consistent approach at different temperatures and relations between the parameters of the system. It is shown that even in the absence of the long-range spin and orbital order, the system exhibits the features in the behavior of thermodynamic characteristics, which are typical of those manifesting themselves at phase transitions. Such features are attributed to the quantum entanglement of the coupled spin and orbital degrees of freedom.

7 pages, 9 figures, submitted to JETP Letters

References in corpus (6)

• Thermodynamics of a one-dimensional frustrated spin-1/2 Heisenberg ferromagnet
• Entanglement Entropy and Spectra of the One-dimensional Kugel-Khomskii Model
• Von Neumann Entropy Spectra and Entangled Excitations in Spin-Orbital Models
• Spin-Orbital Entanglement and Phase Diagram of Spin-orbital Chain with $SU(2)\times SU(2)$ Symmetry
• Magnetic phase diagram and quantum phase transitions in a two-species boson model
• Elementary Excitations in the Symmetric Spin--Orbital Model