FEMTOSECOND-LUMINESCENCE STUDY OF ELECTRON-TRANSFER IN TYPE-II GAAS/ALAS SUPERLATTICES - INTERVALLEY SCATTERING VERSUS STATE MIXING

被引：16

作者：

DEVEAUD, B

CLEROT, F

REGRENY, A

PLANEL, R

GERARD, JM

机构：

[1] CNRS,F-92220 BAGNEUX,FRANCE

[2] FRANCE TELECOM,CTR NATL ETUD TELECOMMUN,F-92220 BAGNEUX,FRANCE

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.49.13560

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use luminescence with femtosecond resolution to study the transfer of electrons from the GaAs layers to the AlAs layers in type-II GaAs/AlAs superlattices. Transfer times are measured to vary from 140 fs to 25 ps depending on superlattice parameters and on the temperature. The temperature dependence, the absence of resonance effects, and the comparison with theory evidence the predominance of phonon-assisted intervalley scattering and rules out the contribution of state mixing as a transfer mechanism.

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页码：13560 / 13563

页数：4

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