{
  "annotation_id": "2b57563c-edc3-4f44-b5ef-ab150ae91637",
  "date_created": "2026-02-17T05:53:04.936000Z",
  "date_modified": "2026-02-17T05:53:04.936000Z",
  "file_hash": "4aa8689c5d3be38cce641c99565004043de1caa8b5b13a43006556d4709128b0",
  "private": false,
  "record": {
    "abstract": "Evidence for a new type of superfluid phase in second-layer $^4$He on graphite has been obtained from simultaneous measurements of torsional-oscillator response and heat-capacity on exactly the same sample down to 30 mK, which resolve substrate-related uncertainties in the previous studies. The new phase hosts both superfluidity and enhanced viscoelasticity, and is stable over a finite density interval, strongly supporting the proposed superfluid liquid-crystal hypothesis. A random-Josephson-network analysis shows that the widely reported log-$T$ dependence of the superfluid density is likely due to substrate imperfections.",
    "arxiv_id": "2601.05719",
    "authors": [
      "Jun Usami",
      "Hiroshi Fukuyama"
    ],
    "categories": [
      "cond-mat.other"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "On the Novel Superfluidity in the Second Layer of $^4$He on Graphite",
    "url": "https://arxiv.org/abs/2601.05719",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "515d93b1-c58f-42a5-b504-59d78897baf4",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}