Addressing shape and extent of Weyl cones in TaAs by Landau level spectroscopy
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10451485" target="_blank" >RIV/00216208:11320/22:10451485 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/22:00125580
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=4ehE9~citN" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=4ehE9~citN</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.105.L081114" target="_blank" >10.1103/PhysRevB.105.L081114</a>
Alternative languages
Result language
angličtina
Original language name
Addressing shape and extent of Weyl cones in TaAs by Landau level spectroscopy
Original language description
TaAs is a prime example of a topological semimetal with two types of Weyl nodes, W(1) and W(2), whose bulk signatures have proven elusive. We apply Landau level spectroscopy to crystals with multiple facets and identify - among other low-energy excitations between parabolic bands - the response of a cone extending over a wide energy range. Comparison with density functional theory studies allows us to associate this conical band with nearly isotropic W(2) nodes. In contrast, W(1) cones, which are more anisotropic and less extended in energy, appear to be buried too deep beneath the Fermi level. They cannot be accessed directly. Instead, the excitations in their vicinity give rise to an optical response typical of a narrow-gap semiconductor rather than a Weyl semimetal.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
2469-9969
Volume of the periodical
105
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
5
Pages from-to
L081114
UT code for WoS article
000766642200002
EID of the result in the Scopus database
2-s2.0-85126044488