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

Abstract

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.

10 pages, with 4 Postscript figures

References in corpus (1)

• Dimerization and Incommensurate Spiral Spin Correlations in the Zigzag Spin Chain: Analogies to the Kondo Lattice

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