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 и др.

в: Nanomaterials, Том 12, № 14, 2492, 07.2022.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

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, Том. 12, № 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 и др. Band Structure Near the Dirac Point in HgTe Quantum Wells with Critical Thickness. Nanomaterials. 2022 июль;12(14):2492. doi: 10.3390/nano12142492

Author

Shuvaev, Alexey ; Dziom, Vlad ; Gospodarič, Jan и др. / Band Structure Near the Dirac Point in HgTe Quantum Wells with Critical Thickness. в: Nanomaterials. 2022 ; Том 12, № 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