{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:Q6LT5JJPG6RNUUDG6H5JJWZE4E","short_pith_number":"pith:Q6LT5JJP","canonical_record":{"source":{"id":"0911.1847","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-11-10T07:49:15Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"5d46cd6959ff85a7774a2e84debe59a7fe84635791ed79ef9076a20a742be388","abstract_canon_sha256":"8dfa03c7d1008bcacf844c729d216d9cee2400777842fbf19cec2a317b6bafe2"},"schema_version":"1.0"},"canonical_sha256":"87973ea52f37a2da5066f1fa94db24e1207b5b325680eaa4b158df4ef0d0507b","source":{"kind":"arxiv","id":"0911.1847","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1847","created_at":"2026-05-18T02:10:49Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1847v2","created_at":"2026-05-18T02:10:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1847","created_at":"2026-05-18T02:10:49Z"},{"alias_kind":"pith_short_12","alias_value":"Q6LT5JJPG6RN","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"Q6LT5JJPG6RNUUDG","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"Q6LT5JJP","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:Q6LT5JJPG6RNUUDG6H5JJWZE4E","target":"record","payload":{"canonical_record":{"source":{"id":"0911.1847","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-11-10T07:49:15Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"5d46cd6959ff85a7774a2e84debe59a7fe84635791ed79ef9076a20a742be388","abstract_canon_sha256":"8dfa03c7d1008bcacf844c729d216d9cee2400777842fbf19cec2a317b6bafe2"},"schema_version":"1.0"},"canonical_sha256":"87973ea52f37a2da5066f1fa94db24e1207b5b325680eaa4b158df4ef0d0507b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:49.244614Z","signature_b64":"YgZUYKcwOJjvv4ud/2iKYh0PtIyrzh7n72bclDrawHY6qwRfteh+FXCygyM8ChJl7Gs6y1pLF/ZFZrI3Z29pCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"87973ea52f37a2da5066f1fa94db24e1207b5b325680eaa4b158df4ef0d0507b","last_reissued_at":"2026-05-18T02:10:49.243903Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:49.243903Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0911.1847","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:10:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nv3POAqYEWudCEgCZ+EOOkcuNwS4z1EE2s97oFEREhNAozfvEPSDsg2qnkcuGfjjdhp/8aCbi3aAb74CpltUBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:55:32.994357Z"},"content_sha256":"e03b27692eb2cfb6f1d9cd422dde8e83125d81570a2675cdcbc31c6c97c4c162","schema_version":"1.0","event_id":"sha256:e03b27692eb2cfb6f1d9cd422dde8e83125d81570a2675cdcbc31c6c97c4c162"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:Q6LT5JJPG6RNUUDG6H5JJWZE4E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Well-width dependence of valley splitting in Si/SiGe quantum wells","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Kentarou Sawano, Kiyohiko Toyama, Kohei Sasaki, Ryuichi Masutomi, Tohru Okamoto, Yasuhiro Shiraki","submitted_at":"2009-11-10T07:49:15Z","abstract_excerpt":"The valley splitting in Si two-dimensional electron systems is studied using Si/SiGe single quantum wells (QWs) with different well widths. The energy gaps for 4 and 5.3 nm QWs, obtained from the temperature dependence of the longitudinal resistivity at the Landau level filling factor $\\nu=1$, are much larger than those for 10 and 20 nm QWs. This is consistent with the well-width dependence of the bare valley splitting estimated from the comparison with the Zeeman splitting in the Shubnikov-de Haas oscillations."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1847","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:10:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jz6tmmTU0u/aEk9X6+Ctv3zM6cIOq5DwnvA+dfESzu+bFv07sHNwOR7CSJn6cBHw4miJccjF2ShDsBfdufHmBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:55:32.994719Z"},"content_sha256":"e577faa046f53b94e7cd253187826c77bfe5c519a4e1e3cd36805aeeb8573355","schema_version":"1.0","event_id":"sha256:e577faa046f53b94e7cd253187826c77bfe5c519a4e1e3cd36805aeeb8573355"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q6LT5JJPG6RNUUDG6H5JJWZE4E/bundle.json","state_url":"https://pith.science/pith/Q6LT5JJPG6RNUUDG6H5JJWZE4E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q6LT5JJPG6RNUUDG6H5JJWZE4E/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":"2026-06-03T07:55:32Z","links":{"resolver":"https://pith.science/pith/Q6LT5JJPG6RNUUDG6H5JJWZE4E","bundle":"https://pith.science/pith/Q6LT5JJPG6RNUUDG6H5JJWZE4E/bundle.json","state":"https://pith.science/pith/Q6LT5JJPG6RNUUDG6H5JJWZE4E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q6LT5JJPG6RNUUDG6H5JJWZE4E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:Q6LT5JJPG6RNUUDG6H5JJWZE4E","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":"8dfa03c7d1008bcacf844c729d216d9cee2400777842fbf19cec2a317b6bafe2","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-11-10T07:49:15Z","title_canon_sha256":"5d46cd6959ff85a7774a2e84debe59a7fe84635791ed79ef9076a20a742be388"},"schema_version":"1.0","source":{"id":"0911.1847","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1847","created_at":"2026-05-18T02:10:49Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1847v2","created_at":"2026-05-18T02:10:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1847","created_at":"2026-05-18T02:10:49Z"},{"alias_kind":"pith_short_12","alias_value":"Q6LT5JJPG6RN","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"Q6LT5JJPG6RNUUDG","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"Q6LT5JJP","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:e577faa046f53b94e7cd253187826c77bfe5c519a4e1e3cd36805aeeb8573355","target":"graph","created_at":"2026-05-18T02:10:49Z","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":"The valley splitting in Si two-dimensional electron systems is studied using Si/SiGe single quantum wells (QWs) with different well widths. The energy gaps for 4 and 5.3 nm QWs, obtained from the temperature dependence of the longitudinal resistivity at the Landau level filling factor $\\nu=1$, are much larger than those for 10 and 20 nm QWs. This is consistent with the well-width dependence of the bare valley splitting estimated from the comparison with the Zeeman splitting in the Shubnikov-de Haas oscillations.","authors_text":"Kentarou Sawano, Kiyohiko Toyama, Kohei Sasaki, Ryuichi Masutomi, Tohru Okamoto, Yasuhiro Shiraki","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-11-10T07:49:15Z","title":"Well-width dependence of valley splitting in Si/SiGe quantum wells"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1847","kind":"arxiv","version":2},"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:e03b27692eb2cfb6f1d9cd422dde8e83125d81570a2675cdcbc31c6c97c4c162","target":"record","created_at":"2026-05-18T02:10:49Z","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":"8dfa03c7d1008bcacf844c729d216d9cee2400777842fbf19cec2a317b6bafe2","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-11-10T07:49:15Z","title_canon_sha256":"5d46cd6959ff85a7774a2e84debe59a7fe84635791ed79ef9076a20a742be388"},"schema_version":"1.0","source":{"id":"0911.1847","kind":"arxiv","version":2}},"canonical_sha256":"87973ea52f37a2da5066f1fa94db24e1207b5b325680eaa4b158df4ef0d0507b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"87973ea52f37a2da5066f1fa94db24e1207b5b325680eaa4b158df4ef0d0507b","first_computed_at":"2026-05-18T02:10:49.243903Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:49.243903Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YgZUYKcwOJjvv4ud/2iKYh0PtIyrzh7n72bclDrawHY6qwRfteh+FXCygyM8ChJl7Gs6y1pLF/ZFZrI3Z29pCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:49.244614Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.1847","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e03b27692eb2cfb6f1d9cd422dde8e83125d81570a2675cdcbc31c6c97c4c162","sha256:e577faa046f53b94e7cd253187826c77bfe5c519a4e1e3cd36805aeeb8573355"],"state_sha256":"bbb6d0f8a16fe139638c71c88d2ab33a8b4824596ac5372de0116b0d10989a44"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KR9RQllxhyIkDGw3Cx+voUBTvuaLyiAq3Vvi1xuhxnciYhCHSdqVpkVYttKir34TFo2/DxQXAL1uh4OpsYSnAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T07:55:32.997884Z","bundle_sha256":"eb53a8a175e293202220d7a0d52db698a21ca9a5916696615405d488b96f3679"}}