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Variational Study of the Spin-Gap Phase of the One-Dimensional t-J Model | | | Date: |
1 May 1996 | | Abstract: | We propose a correlated spin-singlet-pairs wave function to describe the spin-gap phase of the one-dimensional $t-J$ model at low density. Adding a Jastrow factor with a variational parameter, $
u$, first introduced by Hellberg and Mele, is shown to correctly describe the long-range behavior expected for the Luther-Emery phase. Using the variational Monte Carlo method we establish a relation between $
u$ and the Luttinger exponent $K_
ho$, $K_
ho=frac{1}{2
u}$. | | Source: | arXiv, cond-mat/9604191 | | Services: | Forum | Review | PDF | Favorites | |
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