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Magnetic order in a spin-1/2 interpolating kagome/square Heisenberg antiferromagnet

Bishop, R. F., Li, P. H. Y., Farnell, Damian J. J. and Campbell, C. E. 2010. Magnetic order in a spin-1/2 interpolating kagome/square Heisenberg antiferromagnet. Physical Review B: Condensed Matter and Materials Physics 82 (10) , 104406. 10.1103/PhysRevB.82.104406

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The coupled cluster method is applied to a spin-half model at zero temperature (T=0), which interpolates between Heisenberg antiferromagnets (HAFs) on a kagome and a square lattice. With respect to an underlying triangular lattice the strengths of the Heisenberg bonds joining the nearest-neighbor (NN) kagome sites are J1≥0 along two of the equivalent directions and J2≥0 along the third. Sites connected by J2 bonds are themselves connected to the missing NN non-kagome sites of the triangular lattice by bonds of strength J1′≥0. When J1′=J1 and J2=0 the model reduces to the square-lattice HAF. The magnetic ordering of the system is investigated and its T=0 phase diagram discussed. Results for the kagome HAF limit are among the best available.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Dentistry
Publisher: American Physical Society
ISSN: 1098-0121
Last Modified: 04 Jun 2017 06:23

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