Transport signatures of Fermi arcs at twin boundaries in Weyl materials

One of the most striking signatures of Weyl fermions in solid-state systems is their surface Fermi arcs. Fermi arcs can also be localized at internal twin boundaries where two Weyl materials of opposite chirality meet. In this work, we derive constraints on the topology and connectivity of these “internal Fermi arcs.” We show that internal Fermi arcs can exhibit transport signatures, and we propose two probes: quantum oscillations and a quantized chiral magnetic current. We propose merohedrally twinned B20 materials as candidates to host internal Fermi arcs, verified through both model and calculations. Our theoretical investigation sheds light on the topological features and motivates experimental studies on the intriguing physics of internal Fermi arcs.

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Publication Details

Journal
Physical review. B./Physical review. B
Published
2025-02-18
DOI
https://doi.org/10.1103/physrevb.111.085133
Citations
5
Primary Topic
Topological Materials and Phenomena
Type
article
Field-Weighted Citation Impact
6.23

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article

Transport signatures of Fermi arcs at twin boundaries in Weyl materials

Sahal Kaushik, Maia G. Vergniory, Leslie Mareike Schoop, Iñigo Robredo et al.
5 citations
Physical review. B./Physical review. B
Topological Materials and Phenomena
6.23
article

Transport signatures of Fermi arcs at twin boundaries in Weyl materials

Sahal Kaushik, Maia G. Vergniory, Leslie Mareike Schoop, Iñigo Robredo, Jennifer Cano, Song Jin, Nitish Mathur
article en
5 citations

Abstract

One of the most striking signatures of Weyl fermions in solid-state systems is their surface Fermi arcs. Fermi arcs can also be localized at internal twin boundaries where two Weyl materials of opposite chirality meet. In this work, we derive constraints on the topology and connectivity of these “internal Fermi arcs.” We show that internal Fermi arcs can exhibit transport signatures, and we propose two probes: quantum oscillations and a quantized chiral magnetic current. We propose merohedrally twinned B20 materials as candidates to host internal Fermi arcs, verified through both model and calculations. Our theoretical investigation sheds light on the topological features and motivates experimental studies on the intriguing physics of internal Fermi arcs.

Physical review. B./Physical review. BVol. 111(8)
University of Wisconsin–Madison (US), Princeton University (US), Max Planck Institute for Chemical Physics of Solids (DE), Flatiron Health (United States) (US), Flatiron Institute (US), Donostia International Physics Center (ES), Stony Brook University (US), KTH Royal Institute of Technology (SE)
National Science Foundation, U.S. Department of Energy, Alfred P. Sloan Foundation, Simons Foundation, Gordon and Betty Moore Foundation, Princeton Center for Complex Materials, Flatiron Health, Deutsche Forschungsgemeinschaft, NordForsk, Ministerio de Ciencia e Innovación, Materials Research Science and Engineering Center, Harvard University, Division of Materials Research
Openalex Percentile: Top 4%
Topological Materials and Phenomena
6.23
DOIOpen Access PDFOpenAlex
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