{
  "id": "2412.06612",
  "version": "v1",
  "published": "2024-12-09T16:04:27.000Z",
  "updated": "2024-12-09T16:04:27.000Z",
  "title": "Crossover from Conventional to Unconventional Superconductivity in 2M-WS2",
  "authors": [
    "Piumi Samarawickrama",
    "Joseph McBride",
    "Sabin Gautam",
    "ZhuangEn Fu",
    "Kenji Watanabe",
    "Takashi Taniguchi",
    "Wenyong Wang",
    "Jinke Tang",
    "John Ackerman",
    "Brian M. Leonard",
    "Jifa Tian"
  ],
  "comment": "15 pages, 4 figures",
  "doi": "10.1021/acs.nanolett.4c05257",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.supr-con"
  ],
  "abstract": "Leveraging reciprocal-space proximity effect between superconducting bulk and topological surface states (TSSs) offers a promising way to topological superconductivity. However, elucidating the mutual influence of bulk and TSSs on topological superconductivity remains a challenge. Here, we report pioneering transport evidence of a thickness-dependent transition from conventional to unconventional superconductivity in 2M-phase WS2 (2M-WS2). As the sample thickness reduces, we see clear changes in key superconducting metrics, including critical temperature, critical current, and carrier density. Notably, while thick 2M-WS2 samples show conventional superconductivity, with an in-plane (IP) upper critical field constrained by the Pauli limit, samples under 20 nm exhibit a pronounced IP critical field enhancement, inversely correlated with 2D carrier density. This marks a distinct crossover to unconventional superconductivity with strong spin-orbit-parity coupling. Our findings underscore the crucial role of sample thickness in accessing topological states in 2D topological superconductors, offering pivotal insights into future studies of topological superconductivity.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-12-09T16:04:27.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "unconventional superconductivity",
      "topological superconductivity",
      "2d carrier density",
      "report pioneering transport evidence",
      "pronounced ip critical field enhancement"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "ACS"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}