{
  "id": "1512.00534",
  "version": "v1",
  "published": "2015-12-02T00:45:04.000Z",
  "updated": "2015-12-02T00:45:04.000Z",
  "title": "Dynamical Axion Field in a Magnetic Topological Insulator Superlattice",
  "authors": [
    "Jing Wang",
    "Biao Lian",
    "Shou-Cheng Zhang"
  ],
  "comment": "4.5 pages, 2 figures, 1 table",
  "categories": [
    "cond-mat.mes-hall",
    "hep-ph"
  ],
  "abstract": "We propose that the dynamical axion field can be realized in a magnetic topological insulator superlattice or a topological paramagnetic insulator. The magnetic fluctuations of these systems produce a pseudoscalar field which has an axionic coupling to the electromagnetic field, and thus it gives a condensed-matter realization of the axion electrodynamics. Compared to the previously proposed dynamical axion materials where a long range antiferromagnetic order is required, the systems proposed here have the advantage that only a uniform magnetization or a paramagnetic state is needed for the dynamic axion. We further propose several experiments to detect such a dynamical axion field.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-12-02T00:45:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "magnetic topological insulator superlattice",
      "dynamical axion field",
      "long range antiferromagnetic order",
      "paramagnetic insulator",
      "magnetic fluctuations"
    ],
    "publication": {
      "doi": "10.1103/PhysRevB.93.045115"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1407850
    }
  }
}