{
  "id": "2008.06198",
  "version": "v1",
  "published": "2020-08-14T06:01:23.000Z",
  "updated": "2020-08-14T06:01:23.000Z",
  "title": "Edge states of Floquet-Dirac semimetal in a laser-driven semiconductor quantum-well",
  "authors": [
    "Boyuan Zhang",
    "Nobuya Maeshima",
    "Ken-ichi Hino"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "Band crossings observed in a wide range of condensed matter systems are recognized as a key to understand low-energy fermionic excitations that behave as massless Dirac particles. Despite rapid progress in this field, the exploration of non-equilibrium topological states remains scarce and it has potential ability of providing a new platform to create unexpected massless Dirac states. Here we show that in a cw-laser driven semiconductor quantum-well, the optical Stark effect conducts bulk-band crossing, and the resulting Floquet-Dirac semimetallic phase supports an unconventional edge state in the projected one-dimensional Brillouin zone. Further, we reveal that this edge state mediates a transition between topological and non-topological edge states that is caused by tuning the laser intensity. The existence of the respective edge states and the related topological numbers are understood in a unified manner in terms of the laser-induced polarization reflecting parity hybridization in the bulk Brillouin zone.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-08-14T06:01:23.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "edge state",
      "laser-driven semiconductor quantum-well",
      "stark effect conducts bulk-band",
      "floquet-dirac semimetallic phase supports",
      "topological states remains scarce"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}