Intrinsic coupling between spatially-separated surface Fermi-arcs in Weyl orbit quantum Hall states.

ABSTRACT: Topological semimetals hosting bulk Weyl points and surface Fermi-arc states are expected to realize unconventional Weyl orbits, which interconnect two surface Fermi-arc states on opposite sample surfaces under magnetic fields. While the presence of Weyl orbits has been proposed to play a vital role in recent observations of the quantum Hall effect even in three-dimensional topological semimetals, actual spatial distribution of the quantized surface transport has been experimentally elusive. Here, we demonstrate intrinsic coupling between two spatially-separated surface states in the Weyl orbits by measuring a dual-gate device of a Dirac semimetal film. Independent scans of top- and back-gate voltages reveal concomitant modulation of doubly-degenerate quantum Hall states, which is not poss

SUBMITTER: Nishihaya S 

PROVIDER: S-EPMC8102497 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature