Role of interface imperfections on intervalley coupling in GaAs/AlAs superlattices

被引：14
|
作者：
Menchero, JG [1 ]
Koiller, B [1 ]
Capaz, RB [1 ]
机构：
[1] Fed Univ Rio De Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 10期
关键词：
D O I：
10.1103/PhysRevLett.83.2034
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a systematic study of the intervalley couplings Gamma-X-1z, Gamma-X-3z, X-1x-X-1y, and X-3x-X-3y in GaAs/AlAs superlattices using the tight-binding formalism. We find that a Gamma-X-1z coupling is obtained by a modification of the first-neighbor hopping at the interface. All four couplings scale inversely with the superlattice period, in agreement with experiment. We calculate the effect of interface alloying on the couplings, considering both even and odd monolayer numbers for GaAs and AlAs. Remarkably, all intervalley couplings are independent of the degree of interface alloying when averaged over the four possible even/odd configurations.
引用
收藏
页码：2034 / 2037
页数：4
相关论文
共 50 条
  • [1] Interface corrugation in GaAs/AlAs (311)A superlattices
    Vorob'ev, AB
    Gutakovsky, AK
    Prinz, VY
    Preobrazhenskii, VV
    Putyato, MA
    APPLIED PHYSICS LETTERS, 2000, 77 (19) : 2976 - 2978
  • [2] Γ-X coupling in diffused AlAs/GaAs superlattices
    Shtinkov, N
    Vlaev, SJ
    Donchev, V
    PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 2000, 221 (02): : R9 - R10
  • [3] Intervalley electron scattering by phonons in (AlAs)1(GaAs)3(001) superlattices
    L. N. Nikitina
    S. N. Grinyaev
    V. G. Tyuterev
    Physics of the Solid State, 2006, 48 : 129 - 138
  • [4] Intervalley electron scattering by phonons in (AlAs)1(GaAs)3(001) superlattices
    Nikitina, LN
    Grinyaev, SN
    Tyuterev, VG
    PHYSICS OF THE SOLID STATE, 2006, 48 (01) : 129 - 138
  • [5] Interface structure of (001) and (113)A GaAs/AlAs superlattices
    Luerssen, D.
    Dinger, A.
    Kalt, H.
    Braun, W.
    Physical Review B: Condensed Matter, 57 (03):
  • [6] Interface structure of (001) and (113)A GaAs/AlAs superlattices
    Luerssen, D
    Dinger, A
    Kalt, H
    Braun, W
    Notzel, R
    Ploog, K
    Tummler, J
    Geurts, J
    PHYSICAL REVIEW B, 1998, 57 (03): : 1631 - 1636
  • [7] VALLEY MIXING AND INTERFACE FLUCTUATIONS IN GAAS/ALAS SUPERLATTICES
    ANDO, T
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1995, 34 (8B): : 4522 - 4525
  • [8] Valley mixing and interface fluctuations in GaAs/AlAs superlattices
    Ando, Tsuneya
    Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes & Review Papers, 1995, 34 (8 B): : 4522 - 4525
  • [9] Intervalley electron scattering by phonons in (GaAs) m (AlAs) n (001) ultrathin superlattices
    Grinyaev, S. N.
    Nikitina, L. N.
    Tyuterev, V. G.
    PHYSICS OF THE SOLID STATE, 2010, 52 (08) : 1606 - 1614
  • [10] Temperature dependence of the intervalley deformation potential of GaAs/AlAs superlattices under hydrostatic pressure
    Guha, S
    Cai, Q
    Chandrasekhar, M
    Chandrasekhar, HR
    Kim, HJ
    Alvarenga, AD
    Vogelgesang, R
    Ramdas, AK
    Melloch, MR
    HIGH-PRESSURE MATERIALS RESEARCH, 1998, 499 : 201 - 206
12345