.png){kind=icon}
.png){kind=icon}
Return
Topological Fermi arc interference on low-symmetry Weyl surfaces
.png){kind=icon}
OA
AI
C
Z
H
M
F
D
J
T
J
T
Y
T
Q
O
DOI：10.1038/s41467-026-76639-5.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Topological materials are defined by the correspondence between bulk topology and boundary states, yet this correspondence becomes enigmatic on low-symmetry surfaces where bulk and surface periodicities may not coincide within a conventional first bulk Brillouin zone projection. Here we study the (103) surface of the Weyl semimetal NdAlSi and identify Fermi arc interference in the boundary spectrum. Angle-resolved photoemission spectroscopy uncovers loop-like Fermi-arc connectivity and characteristic replica modulations that are not observed on high symmetry surfaces. Crucially, the topological surface states themselves are reconstructed because Fermi arcs from phase-shifted bulk-zone projections overlap and hybridize, producing connectivity patterns unique to low-symmetry facets. We show that these emerge from incomplete bulk projection and multi-cell interference governed by a least-common-multiple framework. Least-common-multiple guided density functional theory and Green’s-function calculations reproduce the reconstructed periodicity and dominant replica structure in the spectra, providing a broadly applicable commensuration guideline. These findings resolve the apparent bulk-boundary correspondence paradox on low-symmetry surfaces and provide an operational route to model and interpret boundary spectra on complex facets. Bulk-boundary correspondence in Weyl semimetals is difficult to interpret on low-symmetry facets. Here, the authors resolve this issue on the NdAlSi(103) surface, showing that phase-shifted bulk-zone projections hybridize Fermi arcs into reconstructed, replica-rich surface spectra.
Journal
IF:
15.7
Papers:
9.2W
Citations:
91.2W
Organization
Cited Papers