Electronic band structure of polytypical nanowhiskers
- 作者：Paulo Eduardo de Faria Junior ; fariajunior.pe@gmail.com ; Guilherme Matos Sipahi
- 关键词：polytypism ; nanowhiskers ; band structure ; k· ; p method ; group theory
- 刊名：Physics Procedia
- 出版年：2012
- 期刊代码：P128_18753892
- 类别：ph
- 出版时间：2012
- 卷：28
- 期：Complete
- 页码：72-78
- 文件大小：3204 K
摘要
III-V compound nanowhiskers have attracted much attention recently due to their distinguished electronic and optical properties. In these nanostructures it was observed a phenomenon called polytypism, i. e., a phase alternation between zinc-blend and wurtzite structure. Although the polytypical effect is now well controlled, a more detailed band structure model is not still done, especially in the vicinity of the band edges. In this theoretical study we propose a model to calculate the electronic band structure in the vicinity of the band edges for polytypical nanowhiskers. Relying on group theory concepts and on the k p method we connected the irreducible representations at the 螕-point of the two crystal structures and described them in a single matrix. Our results for InP show the carriers鈥?spatial separation which agrees with reported experiments.