Observation of giant spin-split Fermi-arc with maximal Chern number in the chiral topological semimetal PtGa

Mengyu Yao, Kaustuv Manna (), Qun Yang, Alexander Fedorov, Vladimir Voroshnin, B. Valentin Schwarze, Jacob Hornung, S. Chattopadhyay, Zhe Sun, Satya N. Guin, Jochen Wosnitza, Horst Borrmann, Chandra Shekhar, Nitesh Kumar, Jörg Fink, Yan Sun and Claudia Felser ()
Additional contact information
Mengyu Yao: Max Planck Institute for Chemical Physics of Solids
Kaustuv Manna: Max Planck Institute for Chemical Physics of Solids
Qun Yang: Max Planck Institute for Chemical Physics of Solids
Alexander Fedorov: Helmholtz-Zentrum Berlin fur Materialien und Energie
Vladimir Voroshnin: Helmholtz-Zentrum Berlin fur Materialien und Energie
B. Valentin Schwarze: Dresden High Magnetic Field Laboratory (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtz-Zentrum Dresden-Rossendorf
Jacob Hornung: Dresden High Magnetic Field Laboratory (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtz-Zentrum Dresden-Rossendorf
S. Chattopadhyay: Dresden High Magnetic Field Laboratory (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtz-Zentrum Dresden-Rossendorf
Zhe Sun: University of Science and Technology of China
Satya N. Guin: Max Planck Institute for Chemical Physics of Solids
Jochen Wosnitza: Dresden High Magnetic Field Laboratory (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtz-Zentrum Dresden-Rossendorf
Horst Borrmann: Max Planck Institute for Chemical Physics of Solids
Chandra Shekhar: Max Planck Institute for Chemical Physics of Solids
Nitesh Kumar: Max Planck Institute for Chemical Physics of Solids
Jörg Fink: Max Planck Institute for Chemical Physics of Solids
Yan Sun: Max Planck Institute for Chemical Physics of Solids
Claudia Felser: Max Planck Institute for Chemical Physics of Solids

Nature Communications, 2020, vol. 11, issue 1, 1-7

Abstract: Abstract Non-symmorphic chiral topological crystals host exotic multifold fermions, and their associated Fermi arcs helically wrap around and expand throughout the Brillouin zone between the high-symmetry center and surface-corner momenta. However, Fermi-arc splitting and realization of the theoretically proposed maximal Chern number rely heavily on the spin-orbit coupling (SOC) strength. In the present work, we investigate the topological states of a new chiral crystal, PtGa, which has the strongest SOC among all chiral crystals reported to date. With a comprehensive investigation using high-resolution angle-resolved photoemission spectroscopy, quantum-oscillation measurements, and state-of-the-art ab initio calculations, we report a giant SOC-induced splitting of both Fermi arcs and bulk states. Consequently, this study experimentally confirms the realization of a maximal Chern number equal to ±4 in multifold fermionic systems, thereby providing a platform to observe large-quantized photogalvanic currents in optical experiments.

Date: 2020
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-020-15865-x Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15865-x

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-020-15865-x

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().