{
  "id": "2110.11317",
  "version": "v2",
  "published": "2021-10-21T17:51:13.000Z",
  "updated": "2021-11-30T07:05:59.000Z",
  "title": "Isospin magnetism and spin-triplet superconductivity in Bernal bilayer graphene",
  "authors": [
    "Haoxin Zhou",
    "Ludwig Holleis",
    "Yu Saito",
    "Liam Cohen",
    "William Huynh",
    "Caitlin L. Patterson",
    "Fangyuan Yang",
    "Takashi Taniguchi",
    "Kenji Watanabe",
    "Andrea F. Young"
  ],
  "journal": "Science 375, 774 (2022)",
  "doi": "10.1126/science.abm8386",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "We report the observation of spin-polarized superconductivity in Bernal bilayer graphene when doped to a saddle-point van Hove singularity generated by large applied perpendicular electric field. We observe a cascade of electrostatic gate-tuned transitions between electronic phases distinguished by their polarization within the isospin space defined by the combination of the spin and momentum-space valley degrees of freedom. While all of these phases are metallic at zero magnetic field, we observe a transition to a superconducting state at finite $B_\\parallel\\approx 150$mT applied parallel to the two dimensional sheet. Superconductivity occurs near a symmetry breaking transition, and exists exclusively above the $B_\\parallel$-limit expected of a paramagnetic superconductor with the observed $T_C\\approx 30$mK, implying a spin-triplet order parameter.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2021-11-30T07:05:59.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "bernal bilayer graphene",
      "isospin magnetism",
      "spin-triplet superconductivity",
      "large applied perpendicular electric field",
      "saddle-point van hove singularity"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "AAAS"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}