Cyclotron resonance and interband optical transitions in HgTe/CdTe(0 1 3) quantum well heterostructures
Cyclotron resonance and interband optical transitions in HgTe/CdTe(0 1 3) quantum well heterostructures
Ikonnikov, A.; Zholudev, M.; Spirin, K.; Lastovkin, A.; Maremyanin, K.; Aleshkin, V.; Gavrilenko, V.; Drachenko, O.; Helm, M.; Wosnitza, J.; Goiran, M.; Mikhailov, N.; Dvoretskii, S.; Teppe, F.; Diakonova, N.; Consejo, C.; Chenaud, B.; Knap, W.
Cyclotron resonance spectra of 2D electrons in HgTe/CdxHg1−xTe (0 1 3) quantum well (QW) heterostructures with inverted band structure have been thoroughly studied in quasiclassical magnetic fields versus the electron concentration varied using the persistent photoconductivity effect. The cyclotron mass is shown to increase with QW width in contrast to QWs with normal band structure. The measured values of cyclotron mass are shown to be systematically less than those calculated using the 8 × 8 Kane model with conventional set of HgTe and CdTe material parameters. In quantizing pulsed magnetic fields (Landau level filling factor less than unity) up to 45 T, both intraband (CR) and interband magnetoabsorption have been studied at radiation wavelengths 14.8 and 11.4 µm for the first time. The results obtained are compared with the allowed transition energies between Landau levels in the valence and conduction bands calculated within the same model, the calculated energies being again systematically less (by 3–14%) than the observed optical transition energies.
Keywords: Semiconductors; cyclotron resonance; quantum wells; topological isolators
Involved research facilities
- High Magnetic Field Laboratory (HLD)
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Semiconductor Science and Technology 26(2011), 125011
DOI: 10.1088/0268-1242/26/12/125011
Cited 45 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-16270