The 1D t-J model with next-nearest neighbor hopping - breakdown of the Luttinger liquid?
arXiv:cond-mat/9706126 · doi:10.1103/PhysRevB.56.R14247
Abstract
We investigate the effect of a next-nearest neighbor hopping integral t' in the 1D t-J model, using Lanczos diagonalization of finite chains. Surprisingly, even moderate values of t' have a quite dramatic effect on the dynamical correlation functions and Fermi surface volume. The `holon' becomes diffuse and overdamped, the band structure near the Fermi energy is dominated by t'. Most importantly, however, with increasing hole concentration the system undergoes a phase transition from a `hole pocket' Fermi surface, where k_F corresponds to the number of holes rather than electrons, to a high doping phase where the doped holes correspond to spinless Fermions. Neither phase thus has a Fermi momentum compatible with the `standard' Luttinger liquid.
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References in corpus (1)
Cited by in corpus (3)
- Phase diagram of the one-dimensional Hubbard model with next-nearest-neighbor hopping
- Spectroscopic signatures of next-nearest-neighbor hopping in the charge and spin dynamics of doped one-dimensional antiferromagnets
- The fate of pairing and spin-charge separation in the presence of long-range antiferromagnetism