Thermodynamics and phase transitions for the Heisenberg model on the pinwheel distorted kagome lattice

Details Thermodynamics and phase transitions for the Heisenberg model on the pinwheel distorted kagome lattice Thermodynamics and phase transitions for the Heisenberg model on the pinwheel distorted kagome lattice

2011-05-20

arxiv.org/abs/1105.4147v2

Phys. Rev. B 84, 224411 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 6 figures, 1 table

Scientific paper

10.1103/PhysRevB.84.224411

We study the Heisenberg model on the pinwheel distorted kagome lattice as observed in the material Rb_2Cu_3SnF_12. Experimentally relevant thermodynamic properties at finite temperatures are computed utilizing numerical linked-cluster expansions. We also develop a Lanczos-based, zero-temperature, numerical linked cluster expansion to study the approach of the pinwheel distorted lattice to the uniform kagome-lattice Heisenberg model. We find strong evidence for a phase transition before the uniform limit is reached, implying that the ground state of the kagome-lattice Heisenberg model is likely not pinwheel dimerized and is stable to finite pinwheel-dimerizing perturbations.

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