{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:4KLZCEDZTOEVTYHITQKLX2BXGF","short_pith_number":"pith:4KLZCEDZ","schema_version":"1.0","canonical_sha256":"e2979110799b8959e0e89c14bbe83731669476b9e16bbd0761ce0904ef483d64","source":{"kind":"arxiv","id":"1804.09492","version":2},"attestation_state":"computed","paper":{"title":"Surface and interface structure of quasi-free standing graphene on SiC","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alex Shard, Christos Melios, Olga Kazakova, S. Ravi P. Silva, Steve Spencer, Wlodek Strupinski","submitted_at":"2018-04-25T11:55:56Z","abstract_excerpt":"We perform local nanoscale studies of the surface and interface structure of hydrogen intercalated graphene on 4H-SiC(1000). In particular, we show that intercalation of the interfacial layer results in the formation of quasi-free standing one layer graphene (QFS 1LG) with change in the carrier type from n- to p-type, accompanied by a more than four times increase in carrier mobility. We demonstrate that surface enhanced Raman scattering (SERS) reveals the enhanced Raman signal of Si-H stretching mode, which is the direct proof of successful intercalation. Furthermore, the appearance of D, D+D"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1804.09492","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-04-25T11:55:56Z","cross_cats_sorted":[],"title_canon_sha256":"7dca602584c1d72e610085feab01e0f4520427a747abd3c79e3dfe5ba91590f5","abstract_canon_sha256":"f06018615f9d975c06db24d369886aed094ba1bc9af15796b1b03fa1f999cf3e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:26.786616Z","signature_b64":"S7cf4RMmjPa2wCOsGOZjRQiSK8sG1VeXAJtogChpFgRwOZLL3ydDQF+UJfGZjYkICTh87EJZEszgEY6ZEBfDBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e2979110799b8959e0e89c14bbe83731669476b9e16bbd0761ce0904ef483d64","last_reissued_at":"2026-05-18T00:17:26.785845Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:26.785845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Surface and interface structure of quasi-free standing graphene on SiC","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alex Shard, Christos Melios, Olga Kazakova, S. Ravi P. Silva, Steve Spencer, Wlodek Strupinski","submitted_at":"2018-04-25T11:55:56Z","abstract_excerpt":"We perform local nanoscale studies of the surface and interface structure of hydrogen intercalated graphene on 4H-SiC(1000). In particular, we show that intercalation of the interfacial layer results in the formation of quasi-free standing one layer graphene (QFS 1LG) with change in the carrier type from n- to p-type, accompanied by a more than four times increase in carrier mobility. We demonstrate that surface enhanced Raman scattering (SERS) reveals the enhanced Raman signal of Si-H stretching mode, which is the direct proof of successful intercalation. Furthermore, the appearance of D, D+D"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.09492","kind":"arxiv","version":2},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1804.09492","created_at":"2026-05-18T00:17:26.785973+00:00"},{"alias_kind":"arxiv_version","alias_value":"1804.09492v2","created_at":"2026-05-18T00:17:26.785973+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.09492","created_at":"2026-05-18T00:17:26.785973+00:00"},{"alias_kind":"pith_short_12","alias_value":"4KLZCEDZTOEV","created_at":"2026-05-18T12:32:05.422762+00:00"},{"alias_kind":"pith_short_16","alias_value":"4KLZCEDZTOEVTYHI","created_at":"2026-05-18T12:32:05.422762+00:00"},{"alias_kind":"pith_short_8","alias_value":"4KLZCEDZ","created_at":"2026-05-18T12:32:05.422762+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4KLZCEDZTOEVTYHITQKLX2BXGF","json":"https://pith.science/pith/4KLZCEDZTOEVTYHITQKLX2BXGF.json","graph_json":"https://pith.science/api/pith-number/4KLZCEDZTOEVTYHITQKLX2BXGF/graph.json","events_json":"https://pith.science/api/pith-number/4KLZCEDZTOEVTYHITQKLX2BXGF/events.json","paper":"https://pith.science/paper/4KLZCEDZ"},"agent_actions":{"view_html":"https://pith.science/pith/4KLZCEDZTOEVTYHITQKLX2BXGF","download_json":"https://pith.science/pith/4KLZCEDZTOEVTYHITQKLX2BXGF.json","view_paper":"https://pith.science/paper/4KLZCEDZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1804.09492&json=true","fetch_graph":"https://pith.science/api/pith-number/4KLZCEDZTOEVTYHITQKLX2BXGF/graph.json","fetch_events":"https://pith.science/api/pith-number/4KLZCEDZTOEVTYHITQKLX2BXGF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4KLZCEDZTOEVTYHITQKLX2BXGF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4KLZCEDZTOEVTYHITQKLX2BXGF/action/storage_attestation","attest_author":"https://pith.science/pith/4KLZCEDZTOEVTYHITQKLX2BXGF/action/author_attestation","sign_citation":"https://pith.science/pith/4KLZCEDZTOEVTYHITQKLX2BXGF/action/citation_signature","submit_replication":"https://pith.science/pith/4KLZCEDZTOEVTYHITQKLX2BXGF/action/replication_record"}},"created_at":"2026-05-18T00:17:26.785973+00:00","updated_at":"2026-05-18T00:17:26.785973+00:00"}