The Union Jack model: a quantum spin model with frustration on the square lattice

Details The Union Jack model: a quantum spin model with frustration on the square lattice The Union Jack model: a quantum spin model with frustration on the square lattice

2005-11-18

arxiv.org/abs/cond-mat/0511451v1

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 9 figures

Scientific paper

A new quantum spin model with frustration, the `Union Jack' model on the
square lattice, is analyzed using spin-wave theory. For small values of the
frustrating coupling $\alpha$, the system is N{\' e}el ordered as usual, while
for large $\alpha$ the frustration is found to induce a canted phase. The
possibility of an intermediate spin-liquid phase is discussed.

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