{
  "id": "1101.3541",
  "version": "v1",
  "published": "2011-01-18T20:26:28.000Z",
  "updated": "2011-01-18T20:26:28.000Z",
  "title": "Torsional Response and Dissipationless Viscosity in Topological Insulators",
  "authors": [
    "Taylor L. Hughes",
    "Robert G. Leigh",
    "Eduardo Fradkin"
  ],
  "comment": "4+epsilon pages, 1 figure",
  "journal": "Phys Rev Lett. 107, 075502 (2011)",
  "doi": "10.1103/PhysRevLett.107.075502",
  "categories": [
    "cond-mat.mes-hall",
    "hep-th"
  ],
  "abstract": "We consider the visco-elastic response of the electronic degrees of freedom in 2D and 3D topological insulators (TI). Our primary focus is on the 2D Chern insulator which exhibits a bulk dissipationless viscosity analogous to the quantum Hall viscosity predicted in integer and fractional quantum Hall states. We show that the dissipationless viscosity is the response of a TI to torsional deformations of the underlying lattice geometry. The visco-elastic response also indicates that crystal dislocations in Chern insulators will carry momentum density. We briefly discuss generalizations to 3D which imply that time-reversal invariant TI's will exhibit a quantum Hall viscosity on their surfaces.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-01-18T20:26:28.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "62.20.D-",
      "04.50.Kd",
      "73.43.-f"
    ],
    "keywords": [
      "topological insulators",
      "torsional response",
      "quantum hall viscosity",
      "visco-elastic response",
      "fractional quantum hall states"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2011,
      "month": "Aug",
      "volume": 107,
      "number": 7,
      "pages": "075502"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 884797,
      "adsabs": "2011PhRvL.107g5502H"
    }
  }
}