arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.06390cond-mat.mtrl-sci
收藏

新型多孔氮化铝单层结构的第一性原理研究

Novel Porous Aluminum Nitride Monolayer Structures A First-principles Study

Yanwei Luo, Jiahui Hu, Yu Jia

摘要:

利用密度泛函理论中的从头算方法,我们对多孔AlN单层材料的可能结构和各种性质进行了研究。通过声子色散谱和从头算分子动力学模拟,确定了两种多孔AlN单分子膜的结构。我们进一步表明,这些AlN多孔单分子膜具有明确的多孔纳米结构和更高的比表面积,即,它可以与石墨烯相媲美,也可以在高温下保持均匀。此外,这两种多孔单分子膜表现出半导体性质与2.89 eV和2.86 eV的间接带隙,分别。此外,这种多孔单分子膜的电子结构可以由应变调制。多孔氮化铝单层膜在双向应变作用下,其带隙发生间接-直接转变。适度的9%压缩可以触发这种间隙转变。这些结果表明,多孔氮化铝单分子层可能会被用于光电应用,以及在未来的底层催化剂。

英文摘要:

By using ab inito calculations within Density Functional Theory, we have explored the possible structures and various properties of porous AlN monolayer materials. Two kinds of porous AlN monolayer are identified, and the phonon dispersion spectrum together with the ab inito molecular dynamics simulations demonstrate that their structures are stable. We further show that these AlN porous monolayers have well-defined porous nanostructures and even higher specific surface areas, namely, which can be comparable with graphene, and can also be maintained evenly at high temperatures. Furthermore, both porous monolayers exhibit semiconductor properties with 2.89 eV and 2.86 eV indirect band gap, respectively. In addition, the electronic structures of such porous monolayers can be modulated by strains. The band gap of porous AlN monolayer experiences an indirect-direct transition when biaxial strain is applied. A moderate 9% compression can trigger this gap transition. These results indicate that the porous AlN monolayer may potentially be used for optoelectronic applications, as well as for underlying catalysts in the future.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑