Orbital Fingerprint of Topological Fermi Arcs in a Weyl Semimetal

Abstract

The monopnictides TaAs and TaP are well-established Weyl semimetals. Yet, a precise assignment of Fermi arcs, accomodating the predicted chiral charge of the bulk Weyl points, has been difficult in these systems, and the topological character of different surface features in the Fermi surface is not fully understood. Here, employing a joint analysis from linear dichroism in angle-resolved photoemission and first-principles calculations, we unveil the orbital texture on the full Fermi surface of TaP(001). We observe pronounced switches in the orbital texture at the projectedWeyl nodes, and show how they facilitate a topological classification of the surface band structure. Our findings establish a critical role of the orbital degrees of freedom in mediating the surface-bulk connectivity in Weyl semimetals.

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• Momentum-space signatures of Berry flux monopoles in a Weyl semimetal
• Topological Singularity Induced Chiral Kohn Anomaly in a Weyl Semimetal
• A large deviation principle linking lineage statistics to fitness in microbial populations
• Non-Local Annihilation of Weyl Fermions in Correlated Systems
• Phonon-limited Transport and Fermi Arc Lifetime in Weyl Semimetals
• Ultrafast Polarization-Tunable Monochromatic Extreme Ultraviolet Source at High-Repetition-Rate
• Spanning Fermi arcs in a two-dimensional magnet
• Observation of 1D Fermi arc states in Weyl semimetal TaAs
• Control of intervalley scattering in Bi${}_2$Te${}_3$ via temperature-dependent band renormalization
• Mechanism for Nodal Topological Superconductivity on PtBi${}_2$ Surface
• Measurements of electronic band structure in CeCoGe${}_3$ by angle-resolved photoemission spectroscopy