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Title: Doubling theorem and boundary states of five-dimensional Weyl semimetal

Journal Article · · Physical Review B
ORCiD logo [1];  [2];  [3]
  1. Stanford Univ., CA (United States). Stanford Inst. for Theoretical Physics
  2. Princeton Univ., NJ (United States). Princeton Center for Theoretical Science
  3. Stanford Univ., CA (United States). Stanford Inst. for Theoretical Physics, and Stanford Center for Topological Quantum Physics

We study the generic band structures of the five-dimensional (5D) Weyl semimetal, in which the band degeneracies are 2D Weyl surfaces in the momentum space, and may have nontrivial linkings with each other if they carry nonzero second Chern numbers. We prove a number of theorems constraining the topological linking configurations of the Weyl surfaces, which can be viewed as a 5D generalization of the celebrated doubling theorem for 3D Weyl semimetal. As a direct physical consequence of these constraints, the 5D Weyl semimetal hosts a rich structure of topological boundary states. We show that on the 4D boundary of the 5D Weyl semimetal, there are 3D chiral Fermi hypersurfaces protected by bulk Weyl surfaces. On top of that, for bulk Weyl surfaces that are linked and carry nonzero second Chern numbers, the associated boundary 3D Fermi hypersurfaces will shrink to singularities at certain energies, which trace out a protected 1D Weyl nodal arc, in analogy to the Fermi arc on the 3D Weyl semimetal surface.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
GBMF4302; AC02-76SF00515
OSTI ID:
1560630
Alternate ID(s):
OSTI ID: 1557345
Journal Information:
Physical Review B, Vol. 100, Issue 7; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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Figures / Tables (4)


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