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Probing the Berry Curvature and Fermi Arcs of a Weyl Circuit by Lu, Yuehui; Jia, Ningyuan; Su, Lin; Owens, Clai; Juzeliūnas, Gediminas; Schuster, David I.; Simon, Jonathan is a scholarly article available to read on EtoBox.

What is Probing the Berry Curvature and Fermi Arcs of a Weyl Circuit about?

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 meta-material 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, for the first time, the Berry curvature distribution through the Brillouin zone and the associated quantized Chiral charge of the Weyl points. 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.

Author

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

Published

2018

Language

EN