Localized vibrational, edges and breathing modes of graphene nanoribbons with topological line defects
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Localized vibrational, edges and breathing modes of graphene nanoribbons with topological line defects
- 发表刊物：
- Eur. Phys. J. B
- 摘要：
- Peculiar vibrational modes of graphene nanoribbons (GNRs) with topological line defects were
presented. We find that phonon dispersion relations of the topological defective GNRs are more similar to
those of perfect armchair-edge GNR than to zigzag-edge GNR in spite of their zigzag edge. All vibrational
modes at Γ point are assigned in detail by analyzing their eigenvectors and are presented by video.
Three types of characteristic vibrational modes, namely, localized vibrational modes in defect sites, edges,
and breathing modes, are observed. Five localized vibrational modes near the defect sites are found to
be robust against the width of the topological line-defective GNR. The Raman D’ band just originates
from one localized mode, 1622 cm^−1. The vibrational mode is sensitive to symmetry. The edge modes
are related with structural symmetry but not with widths. Two edge modes are asymmetrical and only
one is symmetrical. The breathing modes are inversely proportional to the width for wide-defect GNRs,
and inversely proportional to the square root of the width for narrow-defect GNRs. The breathing mode
frequencies of defective GNRs are slightly higher than those of perfect GNRs. These vibrational modes
may be useful in the manipulation of thermal conductance and implementation of single phonon storage.
- 合写作者：
- M. G. Xia*, Z. D. Su, Y. Song, J. Y. Han, S. L. Zhang, and B. W. Li
- 卷号：
- 86
- 页面范围：
- 344
- 是否译文：
- 否
- 发表时间：
- 2013-08-05