Enhancement of the activation energy in modulation-doped AlxGa1-x As/InyGa1-yAs/GaAs quantum wells due to an embedded deep step layer
Creators
- 1. Division of Electrical and Computer Engineering, Advanced Semiconductor Research Center, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791 (Korea, Republic of)
Description
Photoluminescence (PL) measurements on modulation-doped AlxGa1-xAs/InyGa1-yAs/GaAs single and step quantum wells were carried out to investigate the interband transitions and to determine the activation energies in InyGa1-yAs quantum wells. The activation energy of the electrons confined in the step quantum well, as obtained from the temperature-dependent PL spectra, was larger than that of the electrons confined in the single quantum well. The enhancement of the activation energy in the modulation-doped single quantum wells due to an embedded deep step layer originated from an increase in the energy difference between the ground electronic state and the AlxGa1-xAs conduction band edge in the InyGa1-yAs quantum well. These results indicate that the activation energy in modulation-doped AlxGa1-xAs/InyGa1-yAs/GaAs single quantum wells depends on the electronic structure
Additional details
Identifiers
- DOI
- 10.1016/j.mseb.2004.06.021;
- PII
- S0921-5107(04)00299-5;
Publishing Information
- Journal Title
- Materials Science and Engineering. B, Solid-State Materials for Advanced Technology
- Journal Volume
- 113
- Journal Issue
- 1
- Journal Page Range
- p. 56-59
- ISSN
- 0921-5107
- CODEN
- MSBTEK
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 36047461
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ACTIVATION ENERGY; ALUMINIUM ARSENIDES; DOPED MATERIALS; ELECTRONIC STRUCTURE; ELECTRONS; EMISSION SPECTRA; GALLIUM ARSENIDES; INDIUM COMPOUNDS; LAYERS; MODULATION; OPTICAL PROPERTIES; PHOTOLUMINESCENCE; QUANTUM WELLS; TEMPERATURE DEPENDENCE
- Descriptors DEC
- ALUMINIUM COMPOUNDS; ARSENIC COMPOUNDS; ARSENIDES; ELEMENTARY PARTICLES; EMISSION; ENERGY; FERMIONS; GALLIUM COMPOUNDS; LEPTONS; LUMINESCENCE; MATERIALS; NANOSTRUCTURES; PHOTON EMISSION; PHYSICAL PROPERTIES; PNICTIDES; SPECTRA
Optional Information
- Copyright
- Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.