Structural stability and electron‐phonon coupling in two‐dimensional carbon allotropes at high electronic and atomic temperatures

Carbon Trends

B. Ziaja¹  I. Milov²  N. Medvedev³ 

[1] Corresponding author.;Institute of Plasma Physics, Czech Academy of Sciences, Za Slovankou 3, 182 00 Prague 8, Czech Republic;Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 182 21 Prague 8, Czech Republic;

关键词: Graphene;    Pentaheptite;    Biphenylene network;    Nonthermal melting;    Electron-phonon coupling;    Laser irradiation;   

DOI  :  

来源: DOAJ

【 摘 要 】

Several two-dimensional carbon allotropes have been recently fabricated experimentally, triggering various innovative research and technological applications. The properties of such 2d materials under extreme conditions are to a large extent unknown. In this work, we study theoretically the effects of high electronic and atomic temperatures on free-standing graphene, pentaheptite, and biphenylene network. We analyse the limits of their structural stability with respect to thermal and nonthermal damage. With a state-of-the-art approach, we calculate the electronic heat capacity and the electron-phonon coupling parameter dependent on both electronic and atomic temperatures. The knowledge of these parameters may facilitate modelling of various two-dimensional carbon allotropes under laser pulse irradiation, improving understanding of their behaviour in experimental applications.

【 授权许可】

Unknown