Variational states for the spin-Peierls system

Details Variational states for the spin-Peierls system Variational states for the spin-Peierls system

1997-01-28

arxiv.org/abs/cond-mat/9701200v2

Phys. Rev. B56 (1997) 5359-5365

Physics

Condensed Matter

Statistical Mechanics

RevTeX+epsf macros, 24 pp. incl. figures, some references added

Scientific paper

10.1103/PhysRevB.56.5359

We introduce a family of Jastrow pair product states for quasi one-dimensional spin systems. Depending on a parameter they interpolate between the resonating valence bond ground state of the Haldane-Shastry model describing a spin liquid and the (dimerized) valence bond solid ground states of the Majumdar-Ghosh spin chain. These states are found to form an excellent basis for variational studies of Heisenberg chains with next nearest neighbour interaction and bond alternation as realized in the spin-Peierls system CuGeO_3.

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