Band Structure Near the Dirac Point in HgTe Quantum Wells with Critical Thickness

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Band Structure Near the Dirac Point in HgTe Quantum Wells with Critical Thickness. / Shuvaev, Alexey; Dziom, Vlad; Gospodarič, Jan et al.

In: Nanomaterials, Vol. 12, No. 14, 2492, 07.2022.

Research output: Contribution to journal › Article › peer-review

Harvard

Shuvaev, A, Dziom, V, 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, vol. 12, no. 14, 2492. https://doi.org/10.3390/nano12142492

APA

Shuvaev, A., Dziom, V., Gospodarič, J., Novik, E. G., Dobretsova, A. A., Mikhailov, N. N., Kvon, Z. D., & Pimenov, A. (2022). Band Structure Near the Dirac Point in HgTe Quantum Wells with Critical Thickness. Nanomaterials, 12(14), [2492]. https://doi.org/10.3390/nano12142492

Vancouver

Shuvaev A, Dziom V, Gospodarič J, Novik EG, Dobretsova AA, Mikhailov NN et al. Band Structure Near the Dirac Point in HgTe Quantum Wells with Critical Thickness. Nanomaterials. 2022 Jul;12(14):2492. doi: 10.3390/nano12142492

Author

Shuvaev, Alexey ; Dziom, Vlad ; Gospodarič, Jan et al. / Band Structure Near the Dirac Point in HgTe Quantum Wells with Critical Thickness. In: Nanomaterials. 2022 ; Vol. 12, No. 14.

BibTeX

@article{e28eb755fd26472da0bc4649837826ec,

title = "Band Structure Near the Dirac Point in HgTe Quantum Wells with Critical Thickness",

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 (Formula presented.) 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.",

keywords = "band structure, cyclotron resonance, Dirac fermions, quantum wells, topological insulators",

author = "Alexey Shuvaev and Vlad Dziom and Jan Gospodari{\v c} and Novik, {Elena G.} and Dobretsova, {Alena A.} and Mikhailov, {Nikolay N.} and Kvon, {Ze Don} and Andrei Pimenov",

note = "Funding Information: This work was supported by the Austrian Science Funds (W 1243, I 3456-N27, I 5539-N). Publisher Copyright: {\textcopyright} 2022 by the authors.",

year = "2022",

month = jul,

doi = "10.3390/nano12142492",

language = "English",

volume = "12",

journal = "Nanomaterials",

issn = "2079-4991",

publisher = "MDPI AG",

number = "14",

}

RIS

TY - JOUR

T1 - Band Structure Near the Dirac Point in HgTe Quantum Wells with Critical Thickness

AU - Shuvaev, Alexey

AU - Dziom, Vlad

AU - Gospodarič, Jan

AU - Novik, Elena G.

AU - Dobretsova, Alena A.

AU - Mikhailov, Nikolay N.

AU - Kvon, Ze Don

AU - Pimenov, Andrei

PY - 2022/7

Y1 - 2022/7

N2 - 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 (Formula presented.) 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.

AB - 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 (Formula presented.) 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.

KW - band structure

KW - cyclotron resonance

KW - Dirac fermions

KW - quantum wells

KW - topological insulators

UR - http://www.scopus.com/inward/record.url?scp=85137358774&partnerID=8YFLogxK

U2 - 10.3390/nano12142492

DO - 10.3390/nano12142492

M3 - Article

C2 - 35889716

AN - SCOPUS:85137358774

VL - 12

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 14

M1 - 2492

ER -

ID: 37124639