Addressing shape and extent of Weyl cones in TaAs by Landau
level spectroscopy

J 2022

Addressing shape and extent of Weyl cones in TaAs by Landau level spectroscopy

SANTOS-COTTIN, D., J. WYZULA, F. LE MARDELÉ, I. CRASSEE, E. MARTINO et. al.

Základní údaje

Originální název

Addressing shape and extent of Weyl cones in TaAs by Landau level spectroscopy

Autoři

SANTOS-COTTIN, D. (250 Francie), J. WYZULA (203 Česká republika), F. LE MARDELÉ (250 Francie), I. CRASSEE (250 Francie), E. MARTINO (250 Francie), Jiří NOVÁK (203 Česká republika, garant, domácí), G. EGUCHI, Z. RUKELJ (191 Chorvatsko), M. NOVAK (191 Chorvatsko), M. ORLITA (203 Česká republika) a Ana AKRAP (616 Polsko)

Vydání

Physical Review B, College PK, The American Physical Society, 2022, 2469-9950

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10300 1.3 Physical sciences

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 3.700

Kód RIV

RIV/00216224:14310/22:00125580

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1103/PhysRevB.105.L081114

UT WoS

000766642200002

Klíčová slova anglicky

Weyl semimetal; Landau level spectroscopy; magneto-optics; TaAs

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 3. 5. 2022 11:42, Mgr. Marie Šípková, DiS.

Anotace

V originále

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.

Citovat

SANTOS-COTTIN, D., J. WYZULA, F. LE MARDELÉ, I. CRASSEE, E. MARTINO, Jiří NOVÁK, G. EGUCHI, Z. RUKELJ, M. NOVAK, M. ORLITA a Ana AKRAP. Addressing shape and extent of Weyl cones in TaAs by Landau level spectroscopy. Physical Review B. College PK: The American Physical Society, 2022, roč. 105, č. 8, s. "L081114-1"-"L081114-5", 5 s. ISSN 2469-9950. Dostupné z: https://dx.doi.org/10.1103/PhysRevB.105.L081114.

@article{1843012,
   author = {SantosandCottin, D. and Wyzula, J. and Le Mardelé, F. and Crassee, I. and Martino, E. and Novák, Jiří and Eguchi, G. and Rukelj, Z. and Novak, M. and Orlita, M. and Akrap, Ana},
   article_location = {College PK},
   article_number = {8},
   doi = {http://dx.doi.org/10.1103/PhysRevB.105.L081114},
   keywords = {Weyl semimetal; Landau level spectroscopy; magneto-optics; TaAs},
   language = {eng},
   issn = {2469-9950},
   journal = {Physical Review B},
   title = {Addressing shape and extent of Weyl cones in TaAs by Landau level spectroscopy},
   url = {https://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.L081114},
   volume = {105},
   year = {2022}
}

TY  - JOUR
ID  - 1843012
AU  - Santos-Cottin, D. - Wyzula, J. - Le Mardelé, F. - Crassee, I. - Martino, E. - Novák, Jiří - Eguchi, G. - Rukelj, Z. - Novak, M. - Orlita, M. - Akrap, Ana
PY  - 2022
TI  - Addressing shape and extent of Weyl cones in TaAs by Landau level spectroscopy
JF  - Physical Review B
VL  - 105
IS  - 8
SP  - "L081114-1"-"L081114-5"
EP  - "L081114-1"-"L081114-5"
PB  - The American Physical Society
SN  - 24699950
KW  - Weyl semimetal
KW  - Landau level spectroscopy
KW  - magneto-optics
KW  - TaAs
UR  - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.L081114
N2  - 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.
ER  -

SANTOS-COTTIN, D., J. WYZULA, F. LE MARDELÉ, I. CRASSEE, E. MARTINO, Jiří NOVÁK, G. EGUCHI, Z. RUKELJ, M. NOVAK, M. ORLITA a Ana AKRAP. Addressing shape and extent of Weyl cones in TaAs by Landau level spectroscopy. \textit{Physical Review B}. College PK: The American Physical Society, 2022, roč.~105, č.~8, s.~''L081114-1''-''L081114-5'', 5 s. ISSN~2469-9950. Dostupné z: https://dx.doi.org/10.1103/PhysRevB.105.L081114.

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