Band structure near the Dirac Point in HgTe quantum wells with critical thickness

Shuvaev A, Dziom U, Gospodarič J, Novik EG, Dobretsova AA, Mikhailov NN, Kvon ZD, Pimenov A. 2022. Band structure near the Dirac Point in HgTe quantum wells with critical thickness. Nanomaterials. 12(14), 2492.

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Journal Article | Published | English

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Author
Shuvaev, Alexey; Dziom, UladzislauISTA ; Gospodarič, Jan; Novik, Elena G.; Dobretsova, Alena A.; Mikhailov, Nikolay N.; Kvon, Ze Don; Pimenov, Andrei
Department
Abstract
Mercury telluride (HgTe) thin films with a critical thickness of 6.5 nm are predicted to possess a gapless Dirac-like band structure. We report a comprehensive study on gated and optically doped samples by magnetooptical spectroscopy in the THz range. The quasi-classical analysis of the cyclotron resonance allowed the mapping of the band dispersion of Dirac charge carriers in a broad range of electron and hole doping. A smooth transition through the charge neutrality point between Dirac holes and electrons was observed. An additional peak coming from a second type of holes with an almost density-independent mass of around 0.04m0 was detected in the hole-doping range and attributed to an asymmetric spin splitting of the Dirac cone. Spectroscopic evidence for disorder-induced band energy fluctuations could not be detected in present cyclotron resonance experiments.
Publishing Year
Date Published
2022-07-20
Journal Title
Nanomaterials
Acknowledgement
This work was supported by the Austrian Science Funds (W1243, I 3456-N27, I 5539-N). Open Access Funding by the Austrian Science Fund (FWF).
Volume
12
Issue
14
Article Number
2492
ISSN
IST-REx-ID

Cite this

Shuvaev A, Dziom U, Gospodarič J, et al. Band structure near the Dirac Point in HgTe quantum wells with critical thickness. Nanomaterials. 2022;12(14). doi:10.3390/nano12142492
Shuvaev, A., Dziom, U., Gospodarič, J., Novik, E. G., Dobretsova, A. A., Mikhailov, N. N., … Pimenov, A. (2022). Band structure near the Dirac Point in HgTe quantum wells with critical thickness. Nanomaterials. MDPI. https://doi.org/10.3390/nano12142492
Shuvaev, Alexey, Uladzislau Dziom, Jan Gospodarič, Elena G. Novik, Alena A. Dobretsova, Nikolay N. Mikhailov, Ze Don Kvon, and Andrei Pimenov. “Band Structure near the Dirac Point in HgTe Quantum Wells with Critical Thickness.” Nanomaterials. MDPI, 2022. https://doi.org/10.3390/nano12142492.
A. Shuvaev et al., “Band structure near the Dirac Point in HgTe quantum wells with critical thickness,” Nanomaterials, vol. 12, no. 14. MDPI, 2022.
Shuvaev A, Dziom U, Gospodarič J, Novik EG, Dobretsova AA, Mikhailov NN, Kvon ZD, Pimenov A. 2022. Band structure near the Dirac Point in HgTe quantum wells with critical thickness. Nanomaterials. 12(14), 2492.
Shuvaev, Alexey, et al. “Band Structure near the Dirac Point in HgTe Quantum Wells with Critical Thickness.” Nanomaterials, vol. 12, no. 14, 2492, MDPI, 2022, doi:10.3390/nano12142492.
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