Spin Gap in CaV4O9: a Large S Appraoch

Details Spin Gap in CaV4O9: a Large S Appraoch Spin Gap in CaV4O9: a Large S Appraoch

1995-11-06

arxiv.org/abs/cond-mat/9511029v2

Physics

Condensed Matter

a little mistake has been corrected, figure 4 is added

Scientific paper

We study the stability of the 4-site plaquette order in a model recently
introduced by Katoh and Imada to explain the spin gap in CaV4O9. We show that
all relevant types of order can be described within the framework of Schwinger
boson mean fiel theory, and we make predictions regarding their relative
stability. The results are compared to exact diagonalisation of finite cluster.

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