...
首页> 外文期刊>Physical Review, B. Condensed Matter >ELECTRONIC STRUCTURES, AND BAND OFFSETS OF HETEROCRYSTALLINE SUPERLATTICES (3C-ALN)(3N)/(2H-ALN)(2N) AND (3C-SIC)(3N)/(2H-SIC)(2N) (N=1,2,3)
【24h】

ELECTRONIC STRUCTURES, AND BAND OFFSETS OF HETEROCRYSTALLINE SUPERLATTICES (3C-ALN)(3N)/(2H-ALN)(2N) AND (3C-SIC)(3N)/(2H-SIC)(2N) (N=1,2,3)

机译:杂晶超晶格(3C-ALN)(3N)/(2H-ALN)(2N)和(3C-SIC)(3N)/(2H-SIC)(2N)的电子结构和能带偏移(N = 1,2 ,3)

获取原文
获取原文并翻译 | 示例
           

摘要

The electronic structures and the band offsets of heterocrystalline superlattices (3C-AlN)(3n)/(2H-AlN)(2n) and (3C-SiC)(3n)/(2H-SiC)(2n) (n = 1, 2, and 3) are studied by ab initio calculations. The results indicate that the band lineups at both (3C-SiC)I(2H-SiC) and (3C-AlN)/(2H-AlN) interfaces are of type-II with small valence-band offsets and large conduction band offsets. The effects of lattice relaxation on the band offsets of the (3C-AlN)/(2H-AlN) system are also investigated. It is found that the band gaps of the heterocrystalline superlattices decrease rapidly with the increase of the slab thickness. This abnormal band-gap behavior is shown to be related to the internal electric fields induced by the intrinsic spontaneous polarization of the 2H structures. [References: 14]
机译:杂晶超晶格(3C-AlN)(3n)/(2H-AlN)(2n)和(3C-SiC)(3n)/(2H-SiC)(2n)的电子结构和能带偏移(n = 1, 2和3)通过从头算来研究。结果表明(3C-SiC)I(2H-SiC)和(3C-AlN)/(2H-AlN)界面处的能带排列均为II型,价带偏移小,导带偏移大。还研究了晶格弛豫对(3C-AlN)/(2H-AlN)系统能带偏移的影响。发现随着平板厚度的增加,异晶超晶格的带隙迅速减小。该异常的带隙行为被证明与2H结构的固有自发极化引起的内部电场有关。 [参考:14]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号