2017/08/20 by Sang Wook Kim, Kangjun Seo, Bruno Uchoa · 13 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Fractional quantum Hall effect #Magnetic field #Physics #Quantum Hall effect #Quantum many-body systems #Quantum mechanics #Quantum spin Hall effect #Theoretical physics #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.97.201101
published in Physical review. B./Physical review. B 97(20) (American Physical Society) · 5 pages, 5 figures
openalex created_date 2017/08/17 · arxiv created 2017/08/20 · openalex publication_date 2018/05/03 · arxiv updated 2018/05/09 · openalex updated_date 2026/08/06
We address the role of short-range interactions for spinless fermions in the hyperhoneycomb lattice, a three-dimensional (3D) structure where all sites have a planar trigonal connectivity. For weak interactions, the system is a node-line semimetal. In the presence of strong interactions, we show that the system can be unstable to a 3D quantum anomalous Hall phase with loop currents that break time-reversal symmetry, as in the Haldane model. We find that the low-energy excitations of this state are Weyl fermions connected by surface Fermi arcs. We show that the 3D anomalous Hall conductivity is e2/(√(3)ah), with a the lattice constant.