The edge state of nanographene and the magnetism of the edge-state spins

被引：103

作者：

Enoki, Toshiaki ^{[1
]}

Takai, Kazuyuki ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan

来源：

SOLID STATE COMMUNICATIONS | 2009年 / 149卷 / 27-28期

基金：

日本学术振兴会;

关键词：

Graphene; Edge states; ELECTRONIC-STRUCTURE; THEORETICAL PREDICTION; GRAPHITE;

D O I：

10.1016/j.ssc.2009.02.054

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Nanographene has unique edge-shape dependence of the electronic structure with non-bonding edge states being created in its zigzag edges. The presence of the edge state is experimentally confirmed in welldefined hydrogen-terminated zigzag edges by scanning tunneling microscopy/spectroscopy (STM/STS) observations. In the three-dimensional (3D) disordered network of nanographite domains in nanoporous carbon (activated carbon fibers), the localized edge-state spins are in a spin-glass-like ordered state at low temperatures with the aid of exchange interactions whose strengths varies randomly in space, when the strengths of inter-nanographene and nanographite interactions are tuned. Chemical and structural modifications of nanographene edges change the magnetism of edge-state spins through covalent bond formation and charge transfer. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1144 / 1150

页数：7

共 58 条

[1] Oligoacenes: Theoretical prediction of open-shell singlet diradical ground states [J].