Spontaneous distortion in the spin-1/2 Ising-Heisenberg model on decorated planar lattices with a magnetoelastic coupling

Abstract

Magnetoelastic properties of the spin-1/2 Ising-Heisenberg model on doubly decorated planar lattices partially amenable to lattice vibrations are examined within the framework of the harmonic approximation and decoration-iteration transformation. It is shown that the mutual interplay between quantum spin fluctuations and local fluctuations of lattice spacings enhances typical quantum features like the quantum reduction of the magnetization in the ground state of the quantum antiferromagnetic phase, while it does not affect the ground-state behaviour of the classical ferromagnetic phase by no means. It also turns out that local fluctuations of lattice spacings are responsible for a much more pronounced reduction of the critical temperature in the quantum antiferromagnetic phase than in the classical ferromagnetic phase.

11 pages, 7 figures

References in corpus (5)

• Exact solution of the geometrically frustrated spin-1/2 Ising-Heisenberg model on the triangulated Kagome (triangles-in-triangles) lattice
• XXZ and Ising Spins on the Triangular Kagome Lattice
• Two dimensional XXZ-Ising model on square-hexagon lattice
• Magnetostriction in an array of spin chains under magnetic field
• Quantum Phase Transition in Antiferromagnetic Heisenberg Chains Coupled to Phonons

Cited by in corpus (3)

• Correlation functions in one-dimensional spin lattices with Ising and Heisenberg bonds
• Thermodynamic model of a solid with RKKY interaction and magnetoelastic coupling
• Self-consistent model of a solid for the description of lattice and magnetic properties