{
  "id": "2011.03905",
  "version": "v1",
  "published": "2020-11-08T05:46:46.000Z",
  "updated": "2020-11-08T05:46:46.000Z",
  "title": "Quantum Sensing of Spin Transport Properties of an Antiferromagnetic Insulator",
  "authors": [
    "Hailong Wang",
    "Shu Zhang",
    "Nathan J. McLaughlin",
    "Benedetta Flebus",
    "Mengqi Huang",
    "Yuxuan Xiao",
    "Eric E. Fullerton",
    "Yaroslav Tserkovnyak",
    "Chunhui Rita Du"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci",
    "cond-mat.str-el",
    "quant-ph"
  ],
  "abstract": "Antiferromagnetic insulators (AFIs) are of significant interest due to their potential to develop next-generation spintronic devices. One major effort in this emerging field is to harness AFIs for long-range spin information communication and storage. Here, we report a non-invasive method to optically access the intrinsic spin transport properties of an archetypical AFI {\\alpha}-Fe2O3 via nitrogen-vacancy (NV) quantum spin sensors. By NV relaxometry measurements, we successfully detect the time-dependent fluctuations of the longitudinal spin density of {\\alpha}-Fe2O3. The observed frequency dependence of the NV relaxation rate is in agreement with a theoretical model, from which an intrinsic spin diffusion constant of {\\alpha}-Fe2O3 is experimentally measured in the absence of external spin biases. Our results highlight the significant opportunity offered by NV centers in diagnosing the underlying spin transport properties in a broad range of high-frequency magnetic materials, which are challenging to access by more conventional measurement techniques.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-11-08T05:46:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "antiferromagnetic insulator",
      "quantum sensing",
      "long-range spin information communication",
      "intrinsic spin diffusion constant",
      "intrinsic spin transport properties"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}