具有仲胺终止锯齿形边缘的石墨烯作为线电子发射源
材料科学
2012-09-05 v1 介观与纳米尺度物理
摘要
通过第一性原理计算发现，在仲胺终止的石墨烯锯齿形边缘上存在极低的真空势垒高度，为 2.30 eV。该边缘结构具有附着于 gamma 点的边缘态平带，此处横向动能为零。我们表明场致电子发射主要由该平带主导。边缘态将费米能级钉扎在恒定值，导致发射能量宽度极窄。具有此类边缘的石墨烯是一种极具前景的线场致电子发射源，能够产生高度相干的发射电流。
引用
@article{arxiv.1209.0517,
title = {Graphene with the secondary amine-terminated zigzag edge as a line electron emitter},
author = {Weiliang Wang and Zhibing Li},
journal= {arXiv preprint arXiv:1209.0517},
year = {2012}
}
备注
10 pages, 4 figures, The following article has been accepted by Applied Physics A. After it is published, it will be found at (http://www.springerlink.com/)