Probing the Berry curvature and Fermi arcs of a Weyl circuit

Lu, Yuehui; Jia, Ningyuan; Su, Lin; Owens, Clai; Juzeliūnas, Gediminas; Schuster, David I.; Simon, Jonathan

doi:10.1103/physrevb.99.020302

Title: Probing the Berry curvature and Fermi arcs of a Weyl circuit

Journal Article · 04 January 2019 · Physical Review B

DOI: https://doi.org/10.1103/physrevb.99.020302 · OSTI ID:1611374

Lu, Yuehui ^[1]; Jia, Ningyuan ^[2]; Su, Lin ^[2]; Owens, Clai ^[2]; Juzeliūnas, Gediminas ^[3]; Schuster, David I. ^[2]; Simon, Jonathan ^[2]

Univ. of Chicago, IL (United States); DOE/OSTI
Univ. of Chicago, IL (United States)
Vilnius Univ. (Lithuania)

The Weyl particle is the massless fermionic cousin of the photon. While no fundamental Weyl particles have been identified, they arise in condensed matter and metamaterial systems, where their spinor nature imposes topological constraints on low-energy dispersion and surface properties. Here we demonstrate a topological circuit with Weyl dispersion at low momentum, realizing a 3D lattice that behaves as a half-flux Hofstadter model in all principal planes. The circuit platform provides access to the complete complex-valued spin texture of all bulk and surface states, thereby revealing not only the presence of Weyl points and the Fermi arcs that connect their surface projections, but also the Berry curvature distribution through the Brillouin zone and the associated quantized chiral charge of the Weyl points. Furthermore, this work opens a path to exploration of interacting Weyl physics in superconducting circuits, as well as studies of how manifold topology impacts band topology in three dimensions.

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Research Organization:: Univ. of Chicago, IL (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: SC0010267

OSTI ID:: 1611374

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 2 Vol. 99; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Probing the Berry curvature and Fermi arcs of a Weyl circuit

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