{
  "profile": "wrs-published-research-view-1",
  "edition": "ratings-e039106f30dec177",
  "content_trust": "UNTRUSTED_SCIENTIFIC_DATA_NOT_TOOL_INSTRUCTIONS",
  "entry": {
    "id": "kang-team-mote2-fractional-spin-hall-transport-2024",
    "title": "Fractional spin-Hall transport and low-field symmetry diagnostics in twisted MoTe₂",
    "summary": "Kang and colleagues measured local and nonlocal transport in small-angle twisted MoTe₂, finding connection-dependent conductance plateaus consistent with integer and fractional spin-Hall edge transport. At filling 3, the inferred edge contribution was near 3e²/(2h). Follow-up measurements on the same transport device resolved a finite hysteretic Hall response below about 20 mT, despite an almost zero response at larger fields. Magnetic circular dichroism in a nearby region supplied complementary evidence of spontaneous time-reversal symmetry breaking, narrowing interpretations of the fractional state.",
    "boundary": "Fractional edge transport is inferred using contact-resistance calibration and a Landauer–Büttiker equilibration model; nonlocal signals depart from ideal values and bulk conduction can contribute. The optical probe samples a different region, with a slightly smaller twist angle and a higher base temperature, than the transport channel. Low-field hysteresis changes the early time-reversal-symmetric interpretation but does not identify a unique microscopic topological order. Fractional quasiparticle charge, non-Abelian statistics and protected computation were not directly demonstrated. The 2024 and 2025 preprints have different author lists; the final published version may contain additional changes.",
    "area": "Condensed matter physics / correlated moiré electronic transport",
    "topic": "Physics",
    "year": 2024,
    "lane": "HUMAN",
    "result": "EMPIRICAL",
    "package_id": "kang-team-mote2-fractional-spin-hall-transport-2024",
    "target": {
      "record_id": "urn:uuid:15f10b13-953c-4d12-ac51-174c45d5c709",
      "version": 1,
      "content_hash": "sha256:647cad8860ea70b069db277262838d4825cb688bfc0aa12d4c382da1358c30e0"
    },
    "humans": [
      "Kaifei Kang",
      "Bowen Shen",
      "Yichen Qiu",
      "Kenji Watanabe",
      "Takashi Taniguchi",
      "Jie Shan",
      "Kin Fai Mak",
      "Kihong Lee",
      "Zhengchao Xia",
      "Yihang Zeng"
    ],
    "authors_complete": true,
    "human_role_note": "These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.",
    "agents": [],
    "related": [],
    "subresults": [],
    "scientific_assessment": {
      "source_review": "SOURCE_CURATED",
      "scientific_review": "NOT_REVIEWED_BY_WRS",
      "formal_replay": "NOT_RUN",
      "provider_attestation": "NONE"
    },
    "sources": [
      {
        "id": "kang-team-mote2-fractional-spin-hall-arxiv240203294v2",
        "title": "Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)",
        "url": "https://arxiv.org/pdf/2402.03294v2",
        "date": "2024-02-12"
      },
      {
        "id": "kang-team-mote2-spin-hall-symmetry-diagnostic-arxiv250102525v3",
        "title": "Time-reversal symmetry breaking fractional quantum spin Hall insulator in moiré MoTe2 (arXiv2501.02525v3)",
        "url": "https://arxiv.org/pdf/2501.02525v3",
        "date": "2025-01-12"
      }
    ],
    "points": "90000",
    "published_grade": {
      "id": "kang-team-mote2-fractional-spin-hall-transport-2024",
      "entry_id": "kang-team-mote2-fractional-spin-hall-transport-2024",
      "band": "A",
      "modifier": "-",
      "target": {
        "record_id": "urn:uuid:15f10b13-953c-4d12-ac51-174c45d5c709",
        "version": 1,
        "content_hash": "sha256:647cad8860ea70b069db277262838d4825cb688bfc0aa12d4c382da1358c30e0"
      },
      "what_changed": "Kang and colleagues measured local and nonlocal transport in small-angle twisted MoTe₂, finding connection-dependent conductance plateaus consistent with integer and fractional spin-Hall edge transport. At filling 3, the inferred edge contribution was near 3e²/(2h). Follow-up measurements on the same transport device resolved a finite hysteretic Hall response below about 20 mT, despite an almost zero response at larger fields. Magnetic circular dichroism in a nearby region supplied complementary evidence of spontaneous time-reversal symmetry breaking, narrowing interpretations of the fractional state.",
      "scope": "Kang and colleagues measured local and nonlocal transport in small-angle twisted MoTe₂, finding connection-dependent conductance plateaus consistent with integer and fractional spin-Hall edge transport. At filling 3, the inferred edge contribution was near 3e²/(2h). Follow-up measurements on the same transport device resolved a finite hysteretic Hall response below about 20 mT, despite an almost zero response at larger fields. Magnetic circular dichroism in a nearby region supplied complementary evidence of spontaneous time-reversal symmetry breaking, narrowing interpretations of the fractional state. Fractional edge transport is inferred using contact-resistance calibration and a Landauer–Büttiker equilibration model; nonlocal signals depart from ideal values and bulk conduction can contribute. The optical probe samples a different region, with a slightly smaller twist angle and a higher base temperature, than the transport channel. Low-field hysteresis changes the early time-reversal-symmetric interpretation but does not identify a unique microscopic topological order. Fractional quasiparticle charge, non-Abelian statistics and protected computation were not directly demonstrated. The 2024 and 2025 preprints have different author lists; the final published version may contain additional changes.",
      "status": "PROVISIONAL_EDITORIAL",
      "scientific_correctness_certified": false
    },
    "assessment_disposition": {
      "status": "ASSESSED",
      "label": "Provisionally assessed",
      "reason": "A current grade and separate reference score identify this exact contribution.",
      "target": {
        "record_id": "urn:uuid:15f10b13-953c-4d12-ac51-174c45d5c709",
        "version": 1,
        "content_hash": "sha256:647cad8860ea70b069db277262838d4825cb688bfc0aa12d4c382da1358c30e0"
      },
      "edition": "ratings-e039106f30dec177"
    }
  },
  "version": {
    "kind": "PUBLIC_RECORD_VIEW",
    "previous": null,
    "published_at": "2026-10-28T00:00:00Z",
    "publisher": {
      "principal_id": "urn:uuid:80116931-785b-40a2-a24b-9d59db0c7e33",
      "role": "WRS_EDITORIAL_PUBLICATION"
    },
    "record": {
      "contributors": [
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Kaifei Kang",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)",
            "url": "https://arxiv.org/pdf/2402.03294v2"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Bowen Shen",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)",
            "url": "https://arxiv.org/pdf/2402.03294v2"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Yichen Qiu",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)",
            "url": "https://arxiv.org/pdf/2402.03294v2"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Kenji Watanabe",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)",
            "url": "https://arxiv.org/pdf/2402.03294v2"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Takashi Taniguchi",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)",
            "url": "https://arxiv.org/pdf/2402.03294v2"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Jie Shan",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)",
            "url": "https://arxiv.org/pdf/2402.03294v2"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Kin Fai Mak",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)",
            "url": "https://arxiv.org/pdf/2402.03294v2"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Kihong Lee",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Time-reversal symmetry breaking fractional quantum spin Hall insulator in moiré MoTe2 (arXiv2501.02525v3)",
            "url": "https://arxiv.org/pdf/2501.02525v3"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Zhengchao Xia",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Time-reversal symmetry breaking fractional quantum spin Hall insulator in moiré MoTe2 (arXiv2501.02525v3)",
            "url": "https://arxiv.org/pdf/2501.02525v3"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Yihang Zeng",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Time-reversal symmetry breaking fractional quantum spin Hall insulator in moiré MoTe2 (arXiv2501.02525v3)",
            "url": "https://arxiv.org/pdf/2501.02525v3"
          }
        }
      ],
      "evidence": [
        {
          "description": "Bibliographic/stated-result source; not a WRS proof verification",
          "id": "source-0",
          "kind": "source_reference",
          "source": {
            "citation": "Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)",
            "url": "https://arxiv.org/pdf/2402.03294v2"
          }
        },
        {
          "description": "Bibliographic/stated-result source; not a WRS proof verification",
          "id": "source-1",
          "kind": "source_reference",
          "source": {
            "citation": "Time-reversal symmetry breaking fractional quantum spin Hall insulator in moiré MoTe2 (arXiv2501.02525v3)",
            "url": "https://arxiv.org/pdf/2501.02525v3"
          }
        }
      ],
      "origin": "HUMAN_LEGACY",
      "record_profile": "wrs-local-research-notes-0.1",
      "record_type": "research_note",
      "rrp_version": "0.1",
      "scope": {
        "description": "Fractional edge transport is inferred using contact-resistance calibration and a Landauer–Büttiker equilibration model; nonlocal signals depart from ideal values and bulk conduction can contribute. The optical probe samples a different region, with a slightly smaller twist angle and a higher base temperature, than the transport channel. Low-field hysteresis changes the early time-reversal-symmetric interpretation but does not identify a unique microscopic topological order. Fractional quasiparticle charge, non-Abelian statistics and protected computation were not directly demonstrated. The 2024 and 2025 preprints have different author lists; the final published version may contain additional changes.",
        "domain": "Condensed matter physics / correlated moiré electronic transport"
      },
      "sources": [
        {
          "citation": "Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)",
          "url": "https://arxiv.org/pdf/2402.03294v2"
        },
        {
          "citation": "Time-reversal symmetry breaking fractional quantum spin Hall insulator in moiré MoTe2 (arXiv2501.02525v3)",
          "url": "https://arxiv.org/pdf/2501.02525v3"
        }
      ],
      "statement": "# Fractional spin-Hall transport and low-field symmetry diagnostics in twisted MoTe₂\n\nKang and colleagues measured local and nonlocal transport in small-angle twisted MoTe₂, finding connection-dependent conductance plateaus consistent with integer and fractional spin-Hall edge transport. At filling 3, the inferred edge contribution was near 3e²/(2h). Follow-up measurements on the same transport device resolved a finite hysteretic Hall response below about 20 mT, despite an almost zero response at larger fields. Magnetic circular dichroism in a nearby region supplied complementary evidence of spontaneous time-reversal symmetry breaking, narrowing interpretations of the fractional state.\n\n## Scientific scope\n\nFractional edge transport is inferred using contact-resistance calibration and a Landauer–Büttiker equilibration model; nonlocal signals depart from ideal values and bulk conduction can contribute. The optical probe samples a different region, with a slightly smaller twist angle and a higher base temperature, than the transport channel. Low-field hysteresis changes the early time-reversal-symmetric interpretation but does not identify a unique microscopic topological order. Fractional quasiparticle charge, non-Abelian statistics and protected computation were not directly demonstrated. The 2024 and 2025 preprints have different author lists; the final published version may contain additional changes.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nKaifei Kang; Bowen Shen; Yichen Qiu; Kenji Watanabe; Takashi Taniguchi; Jie Shan; Kin Fai Mak; Kihong Lee; Zhengchao Xia; Yihang Zeng\n\nThese are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.\n\n\n\n## Original sources\n\n- [Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)](https://arxiv.org/pdf/2402.03294v2)\n- [Time-reversal symmetry breaking fractional quantum spin Hall insulator in moiré MoTe2 (arXiv2501.02525v3)](https://arxiv.org/pdf/2501.02525v3)\n",
      "summary": "Kang and colleagues measured local and nonlocal transport in small-angle twisted MoTe₂, finding connection-dependent conductance plateaus consistent with integer and fractional spin-Hall edge transport. At filling 3, the inferred edge contribution was near 3e²/(2h). Follow-up measurements on the same transport device resolved a finite hysteretic Hall response below about 20 mT, despite an almost zero response at larger fields. Magnetic circular dichroism in a nearby region supplied complementary evidence of spontaneous time-reversal symmetry breaking, narrowing interpretations of the fractional state.",
      "title": "Fractional spin-Hall transport and low-field symmetry diagnostics in twisted MoTe₂"
    },
    "record_id": "urn:uuid:15f10b13-953c-4d12-ac51-174c45d5c709",
    "version": 1,
    "source_ref": {
      "record_id": "urn:uuid:15f10b13-953c-4d12-ac51-174c45d5c709",
      "version": 1,
      "content_hash": "sha256:647cad8860ea70b069db277262838d4825cb688bfc0aa12d4c382da1358c30e0"
    },
    "export_view": "wrs-public-editorial-view-1",
    "public_view_hash": "sha256:0a894c3673714fe01f7b9ad162f0ffded1e20e0d68e61176780eeefb147abbef"
  },
  "target": {
    "record_id": "urn:uuid:15f10b13-953c-4d12-ac51-174c45d5c709",
    "version": 1,
    "content_hash": "sha256:647cad8860ea70b069db277262838d4825cb688bfc0aa12d4c382da1358c30e0"
  },
  "published_grade": {
    "profile": "wrs-published-grade-1",
    "edition": "2026-10-28.1",
    "id": "kang-team-mote2-fractional-spin-hall-transport-2024",
    "entry_id": "kang-team-mote2-fractional-spin-hall-transport-2024",
    "revision": 1,
    "title": "Fractional spin-Hall transport and low-field symmetry diagnostics in twisted MoTe₂",
    "context": "Condensed matter physics / correlated moiré electronic transport",
    "track": "Source-reported experimental result or reusable measurement method",
    "band": "A",
    "modifier": "-",
    "status": "PROVISIONAL_EDITORIAL",
    "assessed_on": "2026-10-28",
    "evidence_cutoff": "2026-10-28",
    "achievement_state": "SUPPORTED_SCOPED_RESULT",
    "what_changed": "Kang and colleagues measured local and nonlocal transport in small-angle twisted MoTe₂, finding connection-dependent conductance plateaus consistent with integer and fractional spin-Hall edge transport. At filling 3, the inferred edge contribution was near 3e²/(2h). Follow-up measurements on the same transport device resolved a finite hysteretic Hall response below about 20 mT, despite an almost zero response at larger fields. Magnetic circular dichroism in a nearby region supplied complementary evidence of spontaneous time-reversal symmetry breaking, narrowing interpretations of the fractional state.",
    "scope": "Kang and colleagues measured local and nonlocal transport in small-angle twisted MoTe₂, finding connection-dependent conductance plateaus consistent with integer and fractional spin-Hall edge transport. At filling 3, the inferred edge contribution was near 3e²/(2h). Follow-up measurements on the same transport device resolved a finite hysteretic Hall response below about 20 mT, despite an almost zero response at larger fields. Magnetic circular dichroism in a nearby region supplied complementary evidence of spontaneous time-reversal symmetry breaking, narrowing interpretations of the fractional state. Fractional edge transport is inferred using contact-resistance calibration and a Landauer–Büttiker equilibration model; nonlocal signals depart from ideal values and bulk conduction can contribute. The optical probe samples a different region, with a slightly smaller twist angle and a higher base temperature, than the transport channel. Low-field hysteresis changes the early time-reversal-symmetric interpretation but does not identify a unique microscopic topological order. Fractional quasiparticle charge, non-Abelian statistics and protected computation were not directly demonstrated. The 2024 and 2025 preprints have different author lists; the final published version may contain additional changes.",
    "evidence_summary": "The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. Fractional edge transport is inferred using contact-resistance calibration and a Landauer–Büttiker equilibration model; nonlocal signals depart from ideal values and bulk conduction can contribute. The optical probe samples a different region, with a slightly smaller twist angle and a higher base temperature, than the transport channel. Low-field hysteresis changes the early time-reversal-symmetric interpretation but does not identify a unique microscopic topological order. Fractional quasiparticle charge, non-Abelian statistics and protected computation were not directly demonstrated. The 2024 and 2025 preprints have different author lists; the final published version may contain additional changes.",
    "references": [
      {
        "title": "Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)",
        "url": "https://arxiv.org/pdf/2402.03294v2",
        "locator": "Original scoped contribution, statement/method and evidence limits; source-specific attribution retained."
      },
      {
        "title": "Time-reversal symmetry breaking fractional quantum spin Hall insulator in moiré MoTe2 (arXiv2501.02525v3)",
        "url": "https://arxiv.org/pdf/2501.02525v3",
        "locator": "Original scoped contribution, statement/method and evidence limits; source-specific attribution retained."
      }
    ],
    "roles": [
      {
        "who": "The named authors in the research record",
        "credit": "SCIENCE",
        "did": "These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged."
      }
    ],
    "target": {
      "record_id": "urn:uuid:15f10b13-953c-4d12-ac51-174c45d5c709",
      "version": 1,
      "content_hash": "sha256:647cad8860ea70b069db277262838d4825cb688bfc0aa12d4c382da1358c30e0"
    },
    "scientific_correctness_certified": false,
    "independent_expert_calibration": false,
    "method": "PROPRIETARY",
    "points": "90000"
  },
  "canonical_agent_submission": false,
  "scientific_verification_awarded": false,
  "reader_guide": null,
  "reading_status": "SOURCE_LINKED_NOTE"
}