{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:ZA32SRQETSWDKGD6OSGQE745GU","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":"fd51397323565475a63e74baa9228a93f8c01ee8b2eeb012161de04efdfea341","cross_cats_sorted":["cond-mat.dis-nn","cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-09-27T17:39:58Z","title_canon_sha256":"56c7b3d3b2da3d2c1b8aa1e24f0f2b3f96b6831a3bbadde5ccf5fd7060986ede"},"schema_version":"1.0","source":{"id":"1709.09649","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.09649","created_at":"2026-05-18T00:27:43Z"},{"alias_kind":"arxiv_version","alias_value":"1709.09649v1","created_at":"2026-05-18T00:27:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.09649","created_at":"2026-05-18T00:27:43Z"},{"alias_kind":"pith_short_12","alias_value":"ZA32SRQETSWD","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZA32SRQETSWDKGD6","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZA32SRQE","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:d0a96ecb98a77d7f1053ee5c1d15fc80374b4d7ed99a520b672b943d1c41c35f","target":"graph","created_at":"2026-05-18T00:27:43Z","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":"Scanning tunneling microscopy (STM) and spectroscopy (STS) in combination with density functional theory (DFT) calculations are employed to study the surface and subsurface properties of the metastable phase of the phase change material Ge$_{2}$Sb$_{2}$Te$_{5}$ as grown by molecular beam epitaxy. The (111) surface is covered by an intact Te layer, which nevertheless allows to detect the more disordered subsurface layer made of Ge and Sb atoms. Centrally, we find that the subsurface layer is significantly more ordered than expected for metastable Ge$_{2}$Sb$_{2}$Te$_{5}$. Firstly, we show that ","authors_text":"A. Giussani, C. Pauly, G. Bihlmayer, J. E. Boschker, J. Kellner, M. Liebmann, M. Morgenstern, R. Calarco, R. Dronskowski, V. L. Deringer","cross_cats":["cond-mat.dis-nn","cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-09-27T17:39:58Z","title":"Exploring the subsurface atomic structure of the epitaxially grown phase change material Ge$_2$Sb$_2$Te$_5$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.09649","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":"sha256:8fc70dc770e2118550af22625bd7a0cf06430912ac8cfe26e26de3ea52c28cee","target":"record","created_at":"2026-05-18T00:27:43Z","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":"fd51397323565475a63e74baa9228a93f8c01ee8b2eeb012161de04efdfea341","cross_cats_sorted":["cond-mat.dis-nn","cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-09-27T17:39:58Z","title_canon_sha256":"56c7b3d3b2da3d2c1b8aa1e24f0f2b3f96b6831a3bbadde5ccf5fd7060986ede"},"schema_version":"1.0","source":{"id":"1709.09649","kind":"arxiv","version":1}},"canonical_sha256":"c837a946049cac35187e748d027f9d35352b7b7eb337ce956bf0b86ad3e59491","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c837a946049cac35187e748d027f9d35352b7b7eb337ce956bf0b86ad3e59491","first_computed_at":"2026-05-18T00:27:43.025690Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:43.025690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2Jdsj/omn6JrneyhZKbYyt8KSwM8dxEte0x6g9zpS8zdCu8fm/6H98FUlruGWmoHn3TXvsb8aUdoe7XAhGXKDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:43.026432Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.09649","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8fc70dc770e2118550af22625bd7a0cf06430912ac8cfe26e26de3ea52c28cee","sha256:d0a96ecb98a77d7f1053ee5c1d15fc80374b4d7ed99a520b672b943d1c41c35f"],"state_sha256":"bb187e5b6f8dbb531465a432e39ac76925555cc7eb745b4de268360f5832a7aa"}