{
  "id": "2209.10534",
  "version": "v1",
  "published": "2022-09-21T17:55:02.000Z",
  "updated": "2022-09-21T17:55:02.000Z",
  "title": "Emergent Magnetism and Intrinsic Anomalous Hall Effect in KTaO$_3$ Two-Dimensional Electron Gases",
  "authors": [
    "Patrick Krantz",
    "Alex Tyner",
    "Pallab Goswami",
    "Venkat Chandrasekhar"
  ],
  "comment": "8 Pages of main text with 5 figures, includes supplementary materials",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.supr-con"
  ],
  "abstract": "There has been intense recent interest in the two-dimensional electron gases (2DEGs) that form at the surfaces and interfaces of KTaO$_3$ (KTO), with the discovery of superconductivity at temperatures significantly higher than those of similar 2DEGs based on SrTiO$_3$ (STO). Here we demonstrate that KTO 2DEGs fabricated under conditions that suppress the superconductivity show emergent magnetism at low temperatures that can be tuned by a gate voltage, V$_g$. The signature of this magnetism is a zero-field transverse voltage that increases in magnitude with decreasing V$_g$, that is strongly asymmetric with respect to an applied perpendicular magnetic field, and that becomes hysteretic in field as the temperature is lowered. We argue that it is due to a finite Berry curvature of the KTO Ta bands in the presence of time-reversal symmetry breaking associated with ordered local moments, with unique features associated with the complex spin texture introduced by spin-orbit interactions in KTO.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-09-21T17:55:02.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "two-dimensional electron gases",
      "intrinsic anomalous hall effect",
      "emergent magnetism",
      "applied perpendicular magnetic field",
      "kto ta bands"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}