Polarity inversion in polar-nonpolar-polar heterostructures

被引：5

作者：

Cho, SL ^{[1
]}

Youn, SJ

Kim, Y

DiVenere, A

Wong, GKL

Freeman, AJ

Ketterson, JB

机构：

[1] Univ Ulsan, Dept Phys, Ulsan 680749, South Korea

[2] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[3] HKUST, Dept Phys, Kowloon, Hong Kong, Peoples R China

[4] Northwestern Univ, Dept Elect & Comp Engn, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.87.126403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed an epilayer-thickness-dependent polarity inversion for the growth of CdTe on Sb(Bi)/CdTe(111)B. For films with Sb(Bi) thicknesses of less than 40 Angstrom (15 Angstrom), the CdTe layer shows a B (Te-terminated) face, but it switches to an A (Cd-terminated) face for thicker layers. On the other hand, a CdTe layer grown on Bi(Sb)/Me(111)A always shows the A face regardless of Sb or Bi layer thicknesses. In order to address the observations we have performed ab initio calculations, which suggest that the polarity of a polar material on a nonpolar one results from the binding energy difference between the two possible surface configurations.

引用

页码：126403 / 126403

页数：4

共 27 条

[1] ENHANCED SHG POWER USING PERIODIC POLING OF VINYLIDENE CYANIDE VINYL-ACETATE COPOLYMER [J].