{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:VQ2XEEIAUO3YTMGG6LSTHZHDM6","short_pith_number":"pith:VQ2XEEIA","canonical_record":{"source":{"id":"1708.02799","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-08-09T12:15:04Z","cross_cats_sorted":[],"title_canon_sha256":"bd830c17ebc3c9f4a8237f85099271a91839b0733e3770cae904d43a22108f11","abstract_canon_sha256":"6251954b741e125fc3982ccb88bc6165adbec32d5ccbb5a41285e3431910e392"},"schema_version":"1.0"},"canonical_sha256":"ac35721100a3b789b0c6f2e533e4e367a4d028f5cb98182f5a50b12fb974555f","source":{"kind":"arxiv","id":"1708.02799","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.02799","created_at":"2026-05-18T00:26:54Z"},{"alias_kind":"arxiv_version","alias_value":"1708.02799v1","created_at":"2026-05-18T00:26:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.02799","created_at":"2026-05-18T00:26:54Z"},{"alias_kind":"pith_short_12","alias_value":"VQ2XEEIAUO3Y","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VQ2XEEIAUO3YTMGG","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VQ2XEEIA","created_at":"2026-05-18T12:31:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:VQ2XEEIAUO3YTMGG6LSTHZHDM6","target":"record","payload":{"canonical_record":{"source":{"id":"1708.02799","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-08-09T12:15:04Z","cross_cats_sorted":[],"title_canon_sha256":"bd830c17ebc3c9f4a8237f85099271a91839b0733e3770cae904d43a22108f11","abstract_canon_sha256":"6251954b741e125fc3982ccb88bc6165adbec32d5ccbb5a41285e3431910e392"},"schema_version":"1.0"},"canonical_sha256":"ac35721100a3b789b0c6f2e533e4e367a4d028f5cb98182f5a50b12fb974555f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:54.565372Z","signature_b64":"0abeHRlN2sW0XeANc/7Jo3JhQd8Ko0pz3r7THDjbroOpR5/bTZrwHCA3mGT0sLJkS0F81V+hUNAOPMCotGdeBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac35721100a3b789b0c6f2e533e4e367a4d028f5cb98182f5a50b12fb974555f","last_reissued_at":"2026-05-18T00:26:54.564523Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:54.564523Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.02799","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:26:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QMFddD9eV3TlvVvv4FDbPwX9CIUDL5eyw5WY/fJbVGNIpgZX7C031dS0vq4cOYQBaVeid0VE1Rd8UdU+4xBnBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T19:01:26.056210Z"},"content_sha256":"1e24257da2b39863ddd22d027e42a9cc2369a548b2a886e8f7194c9c1f31bf43","schema_version":"1.0","event_id":"sha256:1e24257da2b39863ddd22d027e42a9cc2369a548b2a886e8f7194c9c1f31bf43"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:VQ2XEEIAUO3YTMGG6LSTHZHDM6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Contact-Induced Semiconductor-to-Metal Transition in Single-Layer WS$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Albert Bruix, Arlette S. Ngankeu, Bj{\\o}rk Hammer, Charlotte E. Sanders, Jill A. Miwa, Maciej Dendzik, Marco Bianchi, Matteo Michiardi, Philip Hofmann","submitted_at":"2017-08-09T12:15:04Z","abstract_excerpt":"Low-resistance ohmic contacts are a challenge for electronic devices based on two-dimensional materials. We show that an atomically precise junction between a two-dimensional semiconductor and a metallic contact can lead to a semiconductor-to-metal transition in the two-dimensional material--a finding which points the way to a possible method of achieving low-resistance junctions. Specifically, single-layer WS$_2$ undergoes a semiconductor-to-metal transition when epitaxially grown on Ag(111), while it remains a direct band gap semiconductor on Au(111). The metallicity of the single layer on A"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.02799","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:26:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zJlWLrLPGUix/7JObYT5CsybYY79fVhkcNsvjizrdonKlCnjlNqiLF2kxfBMe8EqV5+7vypds5FX/ny6xRuXBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T19:01:26.056596Z"},"content_sha256":"23d406c0f04f37da41543c40b881494cea4462dc2c7d3443db08a58c3e03b7c3","schema_version":"1.0","event_id":"sha256:23d406c0f04f37da41543c40b881494cea4462dc2c7d3443db08a58c3e03b7c3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VQ2XEEIAUO3YTMGG6LSTHZHDM6/bundle.json","state_url":"https://pith.science/pith/VQ2XEEIAUO3YTMGG6LSTHZHDM6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VQ2XEEIAUO3YTMGG6LSTHZHDM6/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-19T19:01:26Z","links":{"resolver":"https://pith.science/pith/VQ2XEEIAUO3YTMGG6LSTHZHDM6","bundle":"https://pith.science/pith/VQ2XEEIAUO3YTMGG6LSTHZHDM6/bundle.json","state":"https://pith.science/pith/VQ2XEEIAUO3YTMGG6LSTHZHDM6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VQ2XEEIAUO3YTMGG6LSTHZHDM6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:VQ2XEEIAUO3YTMGG6LSTHZHDM6","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"6251954b741e125fc3982ccb88bc6165adbec32d5ccbb5a41285e3431910e392","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-08-09T12:15:04Z","title_canon_sha256":"bd830c17ebc3c9f4a8237f85099271a91839b0733e3770cae904d43a22108f11"},"schema_version":"1.0","source":{"id":"1708.02799","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.02799","created_at":"2026-05-18T00:26:54Z"},{"alias_kind":"arxiv_version","alias_value":"1708.02799v1","created_at":"2026-05-18T00:26:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.02799","created_at":"2026-05-18T00:26:54Z"},{"alias_kind":"pith_short_12","alias_value":"VQ2XEEIAUO3Y","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VQ2XEEIAUO3YTMGG","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VQ2XEEIA","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:23d406c0f04f37da41543c40b881494cea4462dc2c7d3443db08a58c3e03b7c3","target":"graph","created_at":"2026-05-18T00:26:54Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Low-resistance ohmic contacts are a challenge for electronic devices based on two-dimensional materials. We show that an atomically precise junction between a two-dimensional semiconductor and a metallic contact can lead to a semiconductor-to-metal transition in the two-dimensional material--a finding which points the way to a possible method of achieving low-resistance junctions. Specifically, single-layer WS$_2$ undergoes a semiconductor-to-metal transition when epitaxially grown on Ag(111), while it remains a direct band gap semiconductor on Au(111). The metallicity of the single layer on A","authors_text":"Albert Bruix, Arlette S. Ngankeu, Bj{\\o}rk Hammer, Charlotte E. Sanders, Jill A. Miwa, Maciej Dendzik, Marco Bianchi, Matteo Michiardi, Philip Hofmann","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-08-09T12:15:04Z","title":"Contact-Induced Semiconductor-to-Metal Transition in Single-Layer WS$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.02799","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:1e24257da2b39863ddd22d027e42a9cc2369a548b2a886e8f7194c9c1f31bf43","target":"record","created_at":"2026-05-18T00:26:54Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"6251954b741e125fc3982ccb88bc6165adbec32d5ccbb5a41285e3431910e392","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-08-09T12:15:04Z","title_canon_sha256":"bd830c17ebc3c9f4a8237f85099271a91839b0733e3770cae904d43a22108f11"},"schema_version":"1.0","source":{"id":"1708.02799","kind":"arxiv","version":1}},"canonical_sha256":"ac35721100a3b789b0c6f2e533e4e367a4d028f5cb98182f5a50b12fb974555f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac35721100a3b789b0c6f2e533e4e367a4d028f5cb98182f5a50b12fb974555f","first_computed_at":"2026-05-18T00:26:54.564523Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:54.564523Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0abeHRlN2sW0XeANc/7Jo3JhQd8Ko0pz3r7THDjbroOpR5/bTZrwHCA3mGT0sLJkS0F81V+hUNAOPMCotGdeBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:54.565372Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.02799","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1e24257da2b39863ddd22d027e42a9cc2369a548b2a886e8f7194c9c1f31bf43","sha256:23d406c0f04f37da41543c40b881494cea4462dc2c7d3443db08a58c3e03b7c3"],"state_sha256":"656a74931b6c7c5361c3359e9b105e9fa5de7afaf91b71bee93065a1995ad681"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3D/yNMQ5nOwNW/t1zYj6xhHJUk0u5R8xyRQ4Lumvb1nSP3gSdCnL/uXJwodE8fXiP1UfhWJ2QXjcFKcwsGYrDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T19:01:26.058749Z","bundle_sha256":"804d2457b9148cdb8e2e91918ab39899f27ffd6a3518f4f5190d3470683b1658"}}