Effects of Next-Nearest-Neighbor Repulsion on One-Dimensional Quarter-Filled Electron Systems
Abstract
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.
- Publication:
-
Journal of the Physical Society of Japan
- Pub Date:
- March 2001
- DOI:
- 10.1143/JPSJ.70.762
- arXiv:
- arXiv:cond-mat/0009208
- Bibcode:
- 2001JPSJ...70..762Y
- Keywords:
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- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 19 pages, 8 figures, submitted to J. Phys. Soc. Jpn