Effects of next-nearest-neighbor repulsion on one-dimensional quarter-filled electron systems

被引：37

作者：

Yoshioka, H ^{[1
]}

Tsuchiizu, M

Suzumura, Y

机构：

[1] Nara Womens Univ, Dept Phys, Nara 6308506, Japan

[2] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2001年 / 70卷 / 03期

关键词：

organic compounds; charge density waves; spin density waves; quarter-filling; long-range Coulomb interaction; spin gap;

D O I：

10.1143/JPSJ.70.762

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 +/-k(F) (K-F: Fermi wave number) and apply the renormalization group method to the bosonized Hamiltonian. It is shown that the next-nearest-neighbor repulsion makes 4k(F)-charge ordering unstable and suppresses the spin fluctuation. Further the excitation gaps and spin susceptibility are also evaluated.

引用

页码：762 / 773

页数：12

共 33 条

[1] GAP IN THE SPIN EXCITATIONS AND MAGNETIZATION CURVE OF THE ONE-DIMENSIONAL ATTRACTIVE HUBBARD-MODEL [J].