Excitons in CdTe/ZnTe heterostructure with atomically thin CdTe layers
Source abstract
Abstract
Heterostructures with atomically thin double quantum wells based on CdTe/ZnTe are investigated by optical spectroscopy (photoluminescence and reflectivity methods) as a function of temperature and density of excitation. Heavy and light exciton luminescence lines are observed with comparable intensities and different temperature behaviors (they cross each other at about 65° K). All these features agree with a complete calculation that takes into account both a very small chemical band offset for such monolayer CdTe inclusions in the ZnTe matrix (namely, 2%), and, consequently, the importance of Coulombic interaction in these double quantum wells.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Semiconductor Quantum Structures and Devices · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
St. Petersburg State University 1 , 199034 St. Petersburg, Russia
Institute of Physics, Polish Academy of Sciences 2 , PL-02-668 Warsaw, Poland
Institut Neel CNRS 3 , 38042 Grenoble, France
Ioffe Institute, Russian Academy of Sciences 4 , 194021 St. Petersburg, Russia
Funding
National Science Center · Saint Petersburg State University
References (24)
Show source-provided references
1. Band offsets and lattice-mismatch effects in strained-layer CdTe/ZnTe superlattices10.1103/physrevb.38.7740 ↗
2. Phase transitions in CdTe/ZnTe strained layer superlattices10.1103/physrevb.44.4017 ↗
3. Ultra-thin semiconductor quantum wells: Potential shapes and strain effects10.1051/jphyscol:1987541 ↗
4. Optical properties of zinc telluride with cadmium telluride submonolayers10.1134/s1063783416100036 ↗
5. Exciton localization in submonolayer InAs/GaAs multiple quantum wells10.1103/physrevb.42.3209 ↗
6. Optical investigation of a strain-induced mixed type-I–type-II superlattice system: CdTe/CdxZn1−xTe10.1103/physrevb.43.14629 ↗
7. Optical- and acoustical-phonon-assisted hopping of localized excitons in CdTe/ZnTe quantum wells10.1103/physrevb.45.4253 ↗
8. Growth and characterization of ultra-thin quantum wells of II–VI semiconductors for optoelectronic applications10.1002/pssb.200304301 ↗
9. Growth control of CdTe/CdZnTe (001) strained-layer superlattices by reflection high-energy electron diffraction oscillations10.1063/1.101938 ↗
10. Semi-empirical description of temperature dependences of band gaps in semiconductors10.1002/pssb.200301752 ↗
11. Temperature dependence of exciton peak energies in ZnS, ZnSe, and ZnTe epitaxial films10.1063/1.371378 ↗
12. 2005
13. Magnetic-field-induced type-I–type-II transition in semimagnetic CdTe/Cd0.93Mn0.07Te superlattice10.1103/physrevb.42.5891 ↗
14. Excitonic effects in separate confinement quantum well heterostructures CdTe/(Cd,Zn)Te10.1103/physrevb.45.6305 ↗
15. Magnetooptics of (Zn,Cd,Mn)Te/ZnTe heterostructures with a small potential gap in the valence band10.1134/s0021364008240065 ↗
16. Photoluminescence and exciton resonances over the scattered light in multiphonon spectra of resonant scattering in the CdTe/ZnTe superlattices with narrow quantum wells10.1134/s1063783413110322 ↗
17. Band offsets in Zn1−xCdxTe/ZnTe single-quantum-well structures grown by molecular-beam epitaxy on GaAs (001) substrates10.1134/1.1188108 ↗
18. Optical study of residual strain in CdTe and ZnTe layer grown by molecular beam epitaxy10.1063/1.101917 ↗
19. Optical investigation of confinement and strain effects in CdTe/Cd1−xZnxTe single quantum wells10.1103/physrevb.38.12443 ↗
20. Martienssen · 2000
21. Exciton binding energies and the valence-band offset in mixed type-I–type-II strained-layer superlattices10.1103/physrevb.46.1557 ↗
22. Ultrathin pseudomorphic layers of ZnTe in CdTe/(Cd,Zn)Te superlattices: A direct optical probe of the mixed-type band configuration10.1103/physrevb.48.1517 ↗
23. Linewidth dependence of radiative exciton lifetime in quantum wells10.1103/physrevlett.59.2337 ↗
24. Excitons in quantum-well structures