摘要近年来,由于半金属材料在两个能带分别具有金属和半导体特性,使其在自旋电子学中具有很大的应用潜能,从而使对半金属材料的探索成为热门研究领域之一。Du等人用密度泛函理论首次证实了最近实验实现的石墨型C4N3(g-C4N3)二文材料显示的铁磁基态;同时,还进一步发现这种材料具有半金属特征。这一结果的报道引发了对无过渡金属元素掺杂的石墨型C4N3(g-C4N3)特殊性能的极大关注。研究结果有助于开辟一条寻找半金属材料的新途径--无金属元素掺杂的半金属材料,这有利于丰富及促进自旋电子学领域的发展。然而,材料的实际应用往往会受到外界环境的影响,因此,有必要对C4N3在不同环境下(比如应力,温度等)的物性进行系统研究,。本论文的主要工作就是理论研究不同应力对石墨型C4N3(g-C4N3)的电学特性和磁学特性的影响。20896
关键词:石墨型C4N3结构 半金属特性 金属性 自旋电子 毕业论文设计说明书(论文)外文摘要
Title Strain effects on the physical properties of C4N3
Abstract
Due to the half-metallic materials have the metallic and semiconducting properties, it has great potential application in spintronics, and the search for half-metallic materials have become one of the hottest research fields recently. Du et al.who first confirmed recent experimental realization of graphite C4N3 (g-C4N3) two-dimensional material display of the ferromagnetic ground state by density functional theory. Meanwhile, they found that this material has the Semi-metallic characteristics.This report caused the great concern for the no metal-doped graphite C4N3 (g-C4N3) special performance .The results will help to open up new ways to find a semi-metallic materials---no metal-doped semi-metallic materials.This will help to enrich and promote the development of spintronics fields.However, the practical application of the material tends to be affected by the external environment,Therefore, it is necessary to make a systematic study to the physical properties of C4N3 in various environments (such as stress, temperature, etc.).This paper mainly does theoretical study to the effects of different tensions on electrical characteristics and magnetic properties of graphite C4N3 (g-C4N3).
Keywords graphite C4N3 structure, half-metallic materials, spintronics
目 次