We show graphene discerns an unconventional sequence of quantized Hall conductivity, when subject to both magnetic fields(B)and strain through both theoretical arguments and numerical calculations. Th
通过第一性原理计算，我们系统的研究了在Ag(111)面上的硅烯的各种位形结构((2x2)silicene/(√7×√7)Ag(111)，(√7×，√7)silicene/(2√3×2√3)Ag(111)，(√7×√7)silicene/(√13×√13)Ag(111))及其电子性质.我们发现，在所有的位型中，硅烯的狄拉克锥都移到了费米面以下约1.5 eV.并且，由于硅烯与Ag沉底之间的能带杂化，狄
碳基超级电容器电化学储能性能取决于其电极/电解质界面形成的双电层.本文使用分子动力学方法,选用石墨烯和氧化石墨烯碳基纳米材料,氯化钠溶液作为电解质,开展了电极/电解质溶液的界面结构模拟,对双电层界面的离子的动力学特性(扩散率、电导率等)、结构特性(电解质密度分布、电荷分布等)和电化学特性(比电容等)进行探究.计算结果表明,在石墨烯材料和氧化石墨烯电极界面,溶液分子受到极板分子间作用和静电库伦作用,
Titanium dioxide dye-sensitized solar cells(Ti02-DSSCs)have been intensively investigated and developed due to their high efficiency, simple fabrication process and low production cost compared with s
Abalance-equation scheme is developed to investigate the magnetotransport in a dc current biased graphene.We examine the Shubnikov-de Haas oscillation under a nonzero bias current.With an increase in
The anisotropic optical and thermoelectric properties of In4Se3 and In4Te3 are studied by the first-principles calculation using the full-potential linearized augmented plane-wave method and the semic
One of the biggest challenges to the applications of graphene is to fabricate three dimensional(3-D)architectures of graphene sheets which inherit its excellent intrinsic properties but overcome its s
在限制于GaAs/A1GaAs异质结中的二维电子气上形成的量子点接触,电导出现以G0=2e2/h为单位的量子台阶,可以在单粒子模型下得到很好的解释,早期,由Glazman和Khaetskii预言,当提高源漏偏压时,电导整数平台G=N×2e2/h逐渐过渡到半整数平台G=(N-1/2×2e2/h,其中N=1,2,3…当G≥2e2/h时,这个理论的预言与实验吻合,但在G<2e2/h时,所有相关实验表明平
In the experimental synthesis of graphene using the chemical vapor deposion methods, it is inevitable to get the polycrystalline graphene composed of many grains and grain boundaries(GBs).