{
  "id": "2008.06907",
  "version": "v1",
  "published": "2020-08-16T13:16:06.000Z",
  "updated": "2020-08-16T13:16:06.000Z",
  "title": "Strange metal behavior of the Hall angle in twisted bilayer graphene",
  "authors": [
    "Rui Lyu",
    "Zachary Tuchfeld",
    "Nishchhal Verma",
    "Haidong Tian",
    "Kenji Watanabe",
    "Takashi Taniguchi",
    "Chun Ning Lau",
    "Mohit Randeria",
    "Marc Bockrath"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "Twisted bilayer graphene (TBG) with interlayer twist angles near the magic angle $\\approx 1.08^{\\circ}$ hosts flat bands and exhibits correlated states including Mott-like insulators, superconductivity and magnetism. Here we report combined temperature-dependent transport measurements of the longitudinal and Hall resistivities in close to magic-angle TBG. While the observed longitudinal resistivity follows linear temperature $T$ dependence consistent with previous reports, the Hall resistance shows an anomalous $T$ dependence with the cotangent of the Hall angle cot $\\Theta{_H} \\propto T^2$. Boltzmann theory for quasiparticle transport predicts that both the resistivity and cot $\\Theta{_H}$ should have the same $T$ dependence, contradicting the observed behavior. This failure of quasiparticle-based theories is reminiscent of other correlated strange metals such as cuprates.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-08-16T13:16:06.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "twisted bilayer graphene",
      "strange metal behavior",
      "quasiparticle transport predicts",
      "hall angle cot",
      "dependence"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}