{
  "id": "1111.6430",
  "version": "v1",
  "published": "2011-11-28T12:27:04.000Z",
  "updated": "2011-11-28T12:27:04.000Z",
  "title": "Symmetry breaking via orbital-dependent reconstruction of electronic structure in uniaxially strained NaFeAs",
  "authors": [
    "Y. Zhang",
    "C. He",
    "Z. R. Ye",
    "J. Jiang",
    "F. Chen",
    "M. Xu",
    "Q. Q. Ge",
    "B. P. Xie",
    "J. Wei",
    "M. Aeschlimann",
    "X. Y. Cui",
    "M. Shi",
    "J. P. Hu",
    "D. L. Feng"
  ],
  "comment": "11 pages, 9 figures",
  "journal": "Phys. Rev. B 85, 085121 (2012)",
  "doi": "10.1103/PhysRevB.85.085121",
  "categories": [
    "cond-mat.supr-con",
    "cond-mat.str-el"
  ],
  "abstract": "The superconductivity discovered in iron-pnictides is intimately related to a nematic ground state, where the C4 rotational symmetry is broken via the structural and magnetic transitions. We here study the nematicity in NaFeAs with the polarization dependent angle-resolved photoemission spectroscopy. A uniaxial strain was applied on the sample to overcome the twinning effect in the low temperature C2-symmetric state, and obtain a much simpler electronic structure than that of a twinned sample. We found the electronic structure undergoes an orbital-dependent reconstruction in the nematic state, primarily involving the dxy- and dyz-dominated bands. These bands strongly hybridize with each other, inducing a band splitting, while the dxz-dominated bands only exhibit an energy shift without any reconstruction. These findings suggest that the development of orbital-dependent spin polarization is likely the dominant force to drive the nematicity, while the ferro-orbital ordering between dxz and dyz orbitals can only play a minor role here.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-11-28T12:27:04.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "74.25.Jb",
      "74.70.Xa",
      "79.60.-i"
    ],
    "keywords": [
      "electronic structure",
      "orbital-dependent reconstruction",
      "uniaxially strained nafeas",
      "symmetry breaking",
      "polarization dependent angle-resolved photoemission spectroscopy"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2012,
      "month": "Feb",
      "volume": 85,
      "number": 8,
      "pages": "085121"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvB..85h5121Z"
    }
  }
}