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Title: Transport signatures of Fermi arcs at twin boundaries in Weyl materials

Journal Article · · Physical Review. B

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. Published by the American Physical Society 2025

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0017662
OSTI ID:
2519709
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 8 Vol. 111; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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