SUBBAND STRUCTURE OF STRAINED-LAYER CDTE/ZNTE SUPERLATTICES - A REEXAMINATION

被引：36

作者：

MATHIEU, H ^{[1
]}

CHATT, A ^{[1
]}

ALLEGRE, J ^{[1
]}

FAURIE, JP ^{[1
]}

机构：

[1] UNIV ILLINOIS,DEPT PHYS,CHICAGO,IL 60680

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.41.6082

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

With recent new values of the CdTe deformation potentials, we present a reexamination of the combined effects of band offsets and lattice mismatch on the subband structure of strained-layer CdTe/ZnTe superlattices. It is shown that the subband structure of these superlattices is very sensitive to the strain parameters. The value Ev=5540 meV is obtained for the zero-strain valence-band offset and a relation between the CdTe (N1) and ZnTe (N2) monolayer numbers of the strained-layer superlattice (CdTe)N1/(ZnTe)N2 giving rise to a degenerate band gap [E(C1H1)=E(C1L1)] is proposed, N1×N230. For N1×N2<30, the band gap is E(C1H1), and the superlattice has a type-I configuration; for N1×N2>30, the band gap is E(C1L1), and the superlattice has a type-II configuration. © 1990 The American Physical Society.

引用

页码：6082 / 6085

页数：4

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