Spin Gaps in a Frustrated Heisenberg model for CaV$_4$O$_9$

Details Spin Gaps in a Frustrated Heisenberg model for CaV$_4$O$_9$ Spin Gaps in a Frustrated Heisenberg model for CaV$_4$O$_9$

1996-04-20

arxiv.org/abs/cond-mat/9604129v1

Physics

Condensed Matter

10 pages, with 4 Postscript figures

Scientific paper

10.1103/PhysRevLett.77.3633

I report results of a density matrix renormalization group (DMRG) study of a model for the two dimensional spin-gapped system CaV$_4$O$_9$. This study represents the first time that DMRG has been used to study a two dimensional system on large lattices, in this case as large as $24\times 11$, allowing extrapolation to the thermodynamic limit. I present a substantial improvement to the DMRG algorithms which makes these calculations feasible.

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