Spin- and charge-polarized states in nanographene ribbons with zigzag edges

被引：130

作者：

Yamashiro, A

Shimoi, Y

Harigaya, K

Wakabayashi, K

机构：

[1] AIST, Nanotechnol Res Inst, Tsukuba, Ibaraki 3058568, Japan

[2] AIST, Res Consortium Synthet Nanofunct Mat Project, Tsukuba, Ibaraki 3058568, Japan

[3] Hiroshima Univ, Grad Sch Adv Sci Matter, Dept Quantum Matter Sci, Higashihiroshima 7398530, Japan

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.68.193410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effects of the nearest-neighbor Coulomb interaction on nanographene ribbons with zigzag edges are investigated using the extended Hubbard model within the unrestricted Hartree-Fock approximation. The nearest Coulomb interaction stabilizes an electronic state with the opposite electric charges separated and localized along both edges, resulting in a finite electric dipole moment pointing from one edge to the other. This charge-polarized state competes with the peculiar spin-polarized state caused by the on-site Coulomb interaction and is stabilized by an external electric field.

引用

页数：4

共 28 条

[1] DIELECTRIC CONSTANT IN PEROVSKITE TYPE CRYSTALS [J].