{
  "id": "1506.06368",
  "version": "v1",
  "published": "2015-06-21T14:14:42.000Z",
  "updated": "2015-06-21T14:14:42.000Z",
  "title": "Quantum Phase Transition and Protected Ideal Transport in a Kondo Chain",
  "authors": [
    "A. M. Tsvelik",
    "O. M. Yevtushenko"
  ],
  "comment": "8 pages (including Supplemental Materials), 1 figure",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.dis-nn",
    "cond-mat.str-el"
  ],
  "abstract": "We study the low energy physics of a Kondo chain where electrons from a one-dimensional band interact with magnetic moments via an anisotropic exchange interaction. It is demonstrated that the anisotropy gives rise to two different phases which are separated by a quantum phase transition. In the phase with easy plane anisotropy, Z$_2$ symmetry between sectors with different helicity of the electrons is broken. As a result, gapless excitations are insensitive to the potential disorder and the dc transport becomes symmetry protected. This effect is similar to the protection of the edge transport in time-reversal invariant topological insulators. The phase with easy axis anisotropy corresponds to the Tomonaga-Luttinger liquid with a pronounced spin-charge separation. The slow charge density wave modes can be pinned by the potential disorder.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-06-21T14:14:42.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "71.10.Pm",
      "72.15.Nj",
      "75.30.Hx"
    ],
    "keywords": [
      "quantum phase transition",
      "protected ideal transport",
      "kondo chain",
      "slow charge density wave modes",
      "potential disorder"
    ],
    "publication": {
      "doi": "10.1103/PhysRevLett.115.216402"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1377443
    }
  }
}