Effects of Next-Nearest-Neighbor Repulsion on One-Dimensional Quarter-Filled Electron Systems

Details Effects of Next-Nearest-Neighbor Repulsion on One-Dimensional Quarter-Filled Electron Systems Effects of Next-Nearest-Neighbor Repulsion on One-Dimensional Quarter-Filled Electron Systems

2000-09-14

arxiv.org/abs/cond-mat/0009208v1

Physics

Condensed Matter

Strongly Correlated Electrons

19 pages, 8 figures, submitted to J. Phys. Soc. Jpn

Scientific paper

We examine effects of the next-nearest-neighbor repulsion on electronic states of a one-dimensional interacting electron system which consists of quarter-filled band and interactions of on-site and nearest-neighbor repulsion. We derive the effective Hamiltonian for the electrons around wave number $\pm \kf$ ($\kf$: Fermi wave number) and apply the renormalization group method to the bosonized Hamiltonian. It is shown that the next-nearest-neighbor repulsion makes $4\kf$-charge ordering unstable and suppresses the spin fluctuation. Further the excitation gaps and spin susceptibility are also evaluated.

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