Spin-phonon coupling induced frustration in the exactly solved spin-1/2 Ising model on a decorated planar lattice☆
作者： Jozef Strečka , Onofre Rojas , Sergio Martins de Souza , None
DOI: 10.1016/J.PHYSLETA.2011.11.008
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摘要: Abstract Spin-1/2 Ising model with a spin-phonon coupling on decorated planar lattices partially amenable to lattice vibrations is examined using the decoration-iteration transformation and harmonic approximation. It shown that magnetoelastic gives rise an effective antiferromagnetic next-nearest-neighbour interaction, which competes nearest-neighbour interaction responsible for frustration of decorating spins. A strong enough consequently leads appearance striking ordered disordered phase, where perfect alignment nodal spins accompanied complete disorder Thermal dependences specific heat are explored in detail.
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