2018/01/31 by László Oroszlány, Balázs Dóra, József Cserti +1
Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Biology #Combinatorics #Graphene research and applications #Loop (graph theory) #Mathematics #NODAL #Physics #Topological Materials and Phenomena #Topology (electrical circuits) #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.97.205107
published as Phys. Rev. B 97, 205107 (2018) · 7 pages, 5 figures. Almost matches the published version
arxiv created 2018/05/08 · openalex publication_date 2018/05/08 · arxiv updated 2018/05/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Nodal loop semimetals are close descendants of Weyl semimetals and possess a topologically dressed band structure. We argue by combining the conventional theory of magnetic oscillation with topological arguments that nodal loop semimetals host coexisting topological and trivial magnetic oscillations. These originate from mapping the topological properties of the extremal Fermi surface cross sections onto the physics of two dimensional semi-Dirac systems, stemming from merging two massless Dirac cones. By tuning the chemical potential and the direction of magnetic field, a sharp transition is identified from purely trivial oscillations, arising from the Landau levels of a normal two dimensional (2D) electron gas, to a phase where oscillations of topological and trivial origin coexist, originating from 2D massless Dirac and semi-Dirac points, respectively. These could in principle be directly identified in current experiments.