Document Type

Article

Publication Date

December 2011

Publication Title

Physical Review B

Volume

84

Issue Number

22

DOI

10.1103/PhysRevB.84.224411

Keywords

Heisenberg, Pinwheel, Thermodynamics, Temperatures, Lanczo-based

Disciplines

Astrophysics and Astronomy | Physical Sciences and Mathematics | Physics

Abstract

We study the Heisenberg model on the pinwheel distorted kagome lattice as observed in the material Rb2Cu3SnF12. 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.

Comments

This article originally appeared in Physical Review B, volume 84, issue 22, 2011, published by the American Physical Society. ©2011 American Physical Society. The article can also be found online at this link.
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