{
  "id": "1703.05958",
  "version": "v1",
  "published": "2017-03-17T10:55:00.000Z",
  "updated": "2017-03-17T10:55:00.000Z",
  "title": "Topological transport in $PT$ invariant Dirac nodal-line semimetals",
  "authors": [
    "W. B. Rui",
    "Y. X. Zhao",
    "Andreas P. Schnyder"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "$PT$ invariant nodal-line semimetals are characterized by one-dimensional Dirac nodal rings that are protected by the combined symmetry of inversion $P$ and time-reversal $T$. The stability of these Dirac rings is guaranteed by a quantized $\\pm \\pi$ Berry phase and their low-energy physics is described by a one-parameter family of (2+1)-dimensional quantum field theories exhibiting the parity anomaly. Here we study the Berry-phase supported topological transport of $PT$ invariant nodal-line semimetals. We find that small inversion breaking allows for an electric-field induced anomalous transverse current, whose universal component originates form the parity anomaly. Due to this Hall-like current, carriers at opposite sides of the Dirac nodal ring flow to opposite surfaces when an electric field is applied. To detect the topological currents, we propose a dumbbell device, which uses surface states to filter charges based on their momenta. Suggestions for experiments and potential device applications are discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-03-17T10:55:00.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "invariant dirac nodal-line semimetals",
      "topological transport",
      "invariant nodal-line semimetals",
      "universal component originates form",
      "one-dimensional dirac nodal rings"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}