<div class="csl-bib-body">
<div class="csl-entry">Shuvaev, A. (2022, June 27). <i>Band structure and quantum conductivity corrections in a Dirac semimetal</i> [Poster Presentation]. 35th International Conference on the Physics of Semiconductors (ICPS 2022), Sydney, Australia. http://hdl.handle.net/20.500.12708/153865</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/153865
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dc.description.abstract
Strained mercury telluride (HgTe) thin films with the critical thickness of 6.5 nm possess a
gapless Dirac-like band structure. We report a comprehensive study of both gated and
optically doped samples by the means of magnetooptical spectroscopy in the THz range.
Analysis of the spectra and magnetic field dependencies at fixed frequencies within the
Drude model has allowed to map the band dispersion of the Dirac charge carriers in the
broad range of densities from 1 to 80·1010 cm-2 and the cyclotron mass range from 0.001 to
0.03 of the free electron mass (m0). A smooth transition through the charge neutrality point
between Dirac holes and electrons was observed. Unexpectedly, an additional peak coming
from another type of holes with the almost density independent mass of around 0.04m0 was
detected in the hole doping range as well. The response of electron-like Dirac carriers at
higher densities exhibit clear deviations from the Drude model in the form of Shubnikov-de
Haas-like oscillations. This all-optical high frequency (0.95 THz) detection of the quantum
corrections to the AC conductivity excludes contact or edge based theoretical models.
en
dc.language.iso
en
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dc.subject
two-dimensional materials
en
dc.subject
topological insulators
en
dc.subject
band structure
en
dc.title
Band structure and quantum conductivity corrections in a Dirac semimetal
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.type.category
Poster Presentation
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tuw.researchTopic.id
M2
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tuw.researchTopic.id
M1
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tuw.researchTopic.id
Q4
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tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.name
Surfaces and Interfaces
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tuw.researchTopic.name
Nanoelectronics
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tuw.researchTopic.value
30
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tuw.researchTopic.value
40
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tuw.researchTopic.value
30
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tuw.publication.orgunit
E138-05 - Forschungsbereich Solid State Spectroscopy
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tuw.author.orcid
0000-0002-7059-3740
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tuw.event.name
35th International Conference on the Physics of Semiconductors (ICPS 2022)
en
tuw.event.startdate
27-06-2022
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tuw.event.enddate
30-06-2022
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tuw.event.online
Hybrid
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tuw.event.type
Event for scientific audience
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tuw.event.place
Sydney
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tuw.event.country
AU
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tuw.event.institution
Arinex Pty Ltd
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tuw.event.presenter
Shuvaev, Alexey
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tuw.event.track
Multi Track
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch.oefos
1030
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wb.sciencebranch.value
100
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item.openairetype
Presentation
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item.openairetype
Vortrag
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item.grantfulltext
none
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item.cerifentitytype
Publications
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item.cerifentitytype
Publications
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item.languageiso639-1
en
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item.openairecristype
http://purl.org/coar/resource_type/c_18cf
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item.openairecristype
http://purl.org/coar/resource_type/c_18cf
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item.fulltext
no Fulltext
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crisitem.author.dept
E138-05 - Forschungsbereich Solid State Spectroscopy