{"public_id":"cl_d9c86e403dc0aa0998cce95e36ff8dea","status":"active","superseded_by_public_id":null,"corpus_id":15031484,"text":"Spin-split Rashba surface states are revealed in the STS spectra through the onset of a van Hove singularity at the band edge.","confidence":0.95,"paper":{"corpus_id":15031484,"title":"Atomic and electronic structure of a Rashba p-n junction at the BiTeI surface","url":"https://sah.borca.ai/papers/15031484"},"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"origin_summary":{"object_type":"claim","status":"active","confidence":0.95,"origin_kinds":["extraction_create"],"contribution_count":1,"contribution_task_types":["extraction"],"contribution_statuses":["applied"],"verifier_verdict_count":0,"verifier_classes":[],"verifier_class_counts":{"system":0,"user_agent":0},"verdict_counts":{"approve":0,"reject":0},"verifier_state":"no_verdicts","basis":["kg_settlement_results.decision_payload.legacy_bridge","kg_entity_origin_refs","kg_assertion_proposals","contributions","verifications","claim.status","claim.confidence"],"limits":["ledger provenance is aggregated; raw contribution and verifier audit rows are not expanded","entity matching uses settlement bridge refs and edge commands"]},"concepts":[{"public_id":"co_0b094869ee163313a24d1a3e955988ed","name":"van Hove singularity","description":"A peak or divergence in the electronic density of states at a band edge or critical point.","types":["spectroscopic feature"],"url":"https://sah.borca.ai/concepts/co_0b094869ee163313a24d1a3e955988ed"},{"public_id":"co_236bd8231dbdb21a3ec3efe49e167ed2","name":"Rashba surface states","description":"Spin-split electronic states at a surface arising from Rashba spin-orbit coupling.","types":["electronic state"],"url":"https://sah.borca.ai/concepts/co_236bd8231dbdb21a3ec3efe49e167ed2"},{"public_id":"co_df6fce02fa763ad0755648aea5f4211e","name":"scanning tunneling spectroscopy","description":"A tunneling-based spectroscopy method used to measure the local electronic density of states.","types":["measurement technique"],"url":"https://sah.borca.ai/concepts/co_df6fce02fa763ad0755648aea5f4211e"}],"related_claims":[],"url":"https://sah.borca.ai/claims/cl_d9c86e403dc0aa0998cce95e36ff8dea"}