Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
  Giant topological longitudinal circular photo-galvanic effect in the chiral multifold semimetal CoSi

Ni, Z., Wang, K., Zhang, Y., Pozo, O., Xu, B., Han, X., et al. (2021). Giant topological longitudinal circular photo-galvanic effect in the chiral multifold semimetal CoSi. Nature Communications, 12: 154, pp. 1-8. doi:10.1038/s41467-020-20408-5.

Item is

Basisdaten

einblenden: ausblenden:
Genre: Zeitschriftenartikel

Dateien

einblenden: Dateien
ausblenden: Dateien
:
Ni_Giant.pdf (Verlagsversion), 2MB
Name:
Ni_Giant.pdf
Beschreibung:
-
OA-Status:
Sichtbarkeit:
Öffentlich
MIME-Typ / Prüfsumme:
application/pdf / [MD5]
Technische Metadaten:
Copyright Datum:
-
Copyright Info:
CC BY 4.0

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Ni, Zhuoliang1, Autor
Wang, K.1, Autor
Zhang, Y.2, Autor           
Pozo, O.1, Autor
Xu, B.1, Autor
Han, X.1, Autor
Manna, K.2, Autor           
Paglione, J.1, Autor
Felser, C.3, Autor           
Grushin, A. G.1, Autor
de Juan, F.1, Autor
Mele, E. J.1, Autor
Wu, L.1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

Inhalt

einblenden:
ausblenden:
Schlagwörter: crystal structure, DNA, electron, emission, literature review, topology, article, calculation, chirality, conductance, crystal, doping, infrared radiation, photon, spectroscopy
 Zusammenfassung: The absence of mirror symmetry, or chirality, is behind striking natural phenomena found in systems as diverse as DNA and crystalline solids. A remarkable example occurs when chiral semimetals with topologically protected band degeneracies are illuminated with circularly polarized light. Under the right conditions, the part of the generated photocurrent that switches sign upon reversal of the light’s polarization, known as the circular photo-galvanic effect, is predicted to depend only on fundamental constants. The conditions to observe quantization are non-universal, and depend on material parameters and the incident frequency. In this work, we perform terahertz emission spectroscopy with tunable photon energy from 0.2 –1.1 eV in the chiral topological semimetal CoSi. We identify a large longitudinal photocurrent peaked at 0.4 eV reaching ~550 μ A/V2, which is much larger than the photocurrent in any chiral crystal reported in the literature. Using first-principles calculations we establish that the peak originates only from topological band crossings, reaching 3.3 ± 0.3 in units of the quantization constant. Our calculations indicate that the quantized circular photo-galvanic effect is within reach in CoSi upon doping and increase of the hot-carrier lifetime. The large photo-conductivity suggests that topological semimetals could potentially be used as novel mid-infrared detectors. © 2021, The Author(s).

Details

einblenden:
ausblenden:
Sprache(n): eng - English
 Datum: 2021-01-082021-01-08
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1038/s41467-020-20408-5
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: Nature Communications
  Kurztitel : Nat. Commun.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: London : Nature Publishing Group
Seiten: - Band / Heft: 12 Artikelnummer: 154 Start- / Endseite: 1 - 8 Identifikator: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723