Ground state phases of the half-filled one-dimensional extended Hubbard model
Sandvik, Anders W.
Campbell, David K.
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Citation (published version)AW Sandvik, L Balents, DK Campbell. 2004. "Ground state phases of the half-filled one-dimensional extended Hubbard model." PHYSICAL REVIEW LETTERS, Volume 92, Issue 23, pp. ? - ? (4). https://doi.org/10.1103/PhysRevLett.92.236401
Using quantum Monte Carlo simulations, results of a strong-coupling expansion, and Luttinger liquid theory, we determine quantitatively the ground state phase diagram of the one-dimensional extended Hubbard model with on-site and nearest-neighbor repulsions U and V. We show that spin frustration stabilizes a bond-ordered (dimerized) state for U≈V/2 up to U/t≈9, where t is the nearest-neighbor hopping. The transition from the dimerized state to the staggered charge-density-wave state for large V/U is continuous for U≲5.5 and first order for higher U.