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  Handedness-dependent quasiparticle interference in the two enantiomers of the topological chiral semimetal PdGa

Sessi, P., Fan, F.-R., Küster, F., Manna, K., Schröter, N. B. M., Ji, J.-R., et al. (2020). Handedness-dependent quasiparticle interference in the two enantiomers of the topological chiral semimetal PdGa. Nature Communications, 11(1): 3507, pp. 1-7. doi:10.1038/s41467-020-17261-x.

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 Creators:
Sessi, Paolo1, Author
Fan, Feng-Ren2, Author              
Küster, Felix1, Author
Manna, Kaustuv2, Author              
Schröter, Niels B. M.1, Author
Ji, Jing-Rong1, Author
Stolz, Samuel1, Author
Krieger, Jonas A.1, Author
Pei, Ding1, Author
Kim, Timur K.1, Author
Dudin, Pavel1, Author
Cacho, Cephise1, Author
Widmer, Roland1, Author
Borrmann, Horst3, Author              
Shi, Wujun1, Author
Chang, Kai1, Author
Sun, Yan2, Author              
Felser, Claudia4, Author              
Parkin, Stuart S. P.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863410              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: It has recently been proposed that combining chirality with topological band theory results in a totally new class of fermions. Understanding how these unconventional quasiparticles propagate and interact remains largely unexplored so far. Here, we use scanning tunneling microscopy to visualize the electronic properties of the prototypical chiral topological semimetal PdGa. We reveal chiral quantum interference patterns of opposite spiraling directions for the two PdGa enantiomers, a direct manifestation of the change of sign of their Chern number. Additionally, we demonstrate that PdGa remains topologically non-trivial over a large energy range, experimentally detecting Fermi arcs in an energy window of more than 1.6 eV that is symmetrically centered around the Fermi level. These results are a consequence of the deep connection between chirality in real and reciprocal space in this class of materials, and, thereby, establish PdGa as an ideal topological chiral semimetal.

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Language(s): eng - English
 Dates: 2020-07-142020-07-14
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1038/s41467-020-17261-x
Other: Sessi2020
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 11 (1) Sequence Number: 3507 Start / End Page: 1 - 7 Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723