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Coherent electron quantum transport in $$\hbox {In}_{0.53}\hbox {Ga}_{0.47}$$As/GaAs$$_{0.51}\hbox {Sb}_{0.49}$$ double barrier resonant tunnelling structures
- Source :
- Optical and Quantum Electronics. 52
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- In this work, we have modelled and computed the transport properties of the double-barrier InGaAs/GaAsSb structure from the resonant tunnelling point of view. Based on the classical Tsu-Esaki formula for the tunnelling current, we have calculated the current density-voltage characteristic of a Al-free type-II $$\hbox {In}_{0.53}\hbox {Ga}_{0.47}\hbox {As/GaAs}_{0.51}\hbox {Sb}_{0.49}$$In0.53Ga0.47As/GaAs0.51Sb0.49 structure at different cryogenic and elevated temperatures. The tunnelling coefficient has been calculated in the framework of effective mass approximation with nonparabolicity included, using the transfer matrix approach. A good qualitative agreement of the position of resonant current peaks with the existing experimental data was achieved. Our calculation shows a very high sensitivity of the tunnelling current peak on monolayer-scale layer structure fluctuation which strongly affects peak to valley ratio in the resonant tunnelling structure.
- Subjects :
- 010302 applied physics
Materials science
Condensed matter physics
02 engineering and technology
Electron
021001 nanoscience & nanotechnology
Double barrier
01 natural sciences
Transfer matrix
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Quantum transport
0103 physical sciences
Effective mass approximation
Sensitivity (control systems)
Electrical and Electronic Engineering
0210 nano-technology
Computer communication networks
Quantum tunnelling
Subjects
Details
- ISSN :
- 1572817X and 03068919
- Volume :
- 52
- Database :
- OpenAIRE
- Journal :
- Optical and Quantum Electronics
- Accession number :
- edsair.doi...........50b92ebd06f552c4c25f953ea92f0932