Vibrational and elastic properties of 2D carbon allotropes: A first principles study

被引：11

作者：

Soni, Himadri R. ^{[1
]}

Jha, Prafulla K. ^{[2
]}

机构：

[1] Maharaja Krishnakumarsinhji Bhavnagar Univ, Dept Phys, Bhavnagar 364002, Gujarat, India

[2] Maharaja Sayajirao Univ Baroda, Fac Sci, Dept Phys, Vadodara 390002, India

来源：

SOLID STATE COMMUNICATIONS | 2014年 / 189卷

关键词：

Graphene; Graphynes; Phonons; Elastic constants; MECHANICAL-PROPERTIES; GRAPHYNE; DYNAMICS; GRAPHENE; CRYSTAL; FILMS; SHEET;

D O I：

10.1016/j.ssc.2014.03.022

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The present paper reports the calculated vibrational and elastic properties of some two dimensional carbon allotropes such as graphene, alpha-, beta- and gamma-graphynes using first principles density functional theory. The phonon modes of graphynes show quite distinct behavior than graphene and have real frequency throughout the Brillouin zone thus indicating dynamically stable structures. The out of plane, ZA mode is more dispersive in the case of graphynes. We have discussed the implications of phonon modes to the thermal conductance in graphynes and graphene. We have also calculated the elastic constants for graphene and graphynes. Calculated elastic constants of graphynes show more anisotropic conformer nature than graphene. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：58 / 62

页数：5

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