{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:7VMTIZSCF2M6CBQ42VZISUD7CQ","short_pith_number":"pith:7VMTIZSC","canonical_record":{"source":{"id":"1505.04277","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-05-16T14:20:58Z","cross_cats_sorted":[],"title_canon_sha256":"aa489f2835ea9f42459a78185e3bd33867aa60a89c7ca240da3158b2f95e4df0","abstract_canon_sha256":"2b6b6499d60b869cdc033642b290792542416246e6a455fcec9bb5fade3ab1f2"},"schema_version":"1.0"},"canonical_sha256":"fd593466422e99e1061cd57289507f14185156e435d213dd60cd54be624a3d32","source":{"kind":"arxiv","id":"1505.04277","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.04277","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"arxiv_version","alias_value":"1505.04277v1","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.04277","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"pith_short_12","alias_value":"7VMTIZSCF2M6","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"7VMTIZSCF2M6CBQ4","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"7VMTIZSC","created_at":"2026-05-18T12:29:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:7VMTIZSCF2M6CBQ42VZISUD7CQ","target":"record","payload":{"canonical_record":{"source":{"id":"1505.04277","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-05-16T14:20:58Z","cross_cats_sorted":[],"title_canon_sha256":"aa489f2835ea9f42459a78185e3bd33867aa60a89c7ca240da3158b2f95e4df0","abstract_canon_sha256":"2b6b6499d60b869cdc033642b290792542416246e6a455fcec9bb5fade3ab1f2"},"schema_version":"1.0"},"canonical_sha256":"fd593466422e99e1061cd57289507f14185156e435d213dd60cd54be624a3d32","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:07:25.877385Z","signature_b64":"q6WyIsl83YRmcMhe4kVy4cuDUYo1G9rARPijV/599C7L13c8ZQP2DYeIex5R30nkdxM0pRayMrgahq5fOCrJBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fd593466422e99e1061cd57289507f14185156e435d213dd60cd54be624a3d32","last_reissued_at":"2026-05-18T02:07:25.876928Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:07:25.876928Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.04277","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":"2026-05-18T02:07:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ApVu+EEKGTwf1I5pxgFbPYgoZ/aM6Y7EMCDlrOr+Be65xGsI/s2BcDq7J/5K4lrirhnnKTkObuEmQzQXLuB5Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T21:40:58.504602Z"},"content_sha256":"f0ceaa640ab2da92b628bf886c55c10d373f02bd6169d8979345c1d5af3fdf22","schema_version":"1.0","event_id":"sha256:f0ceaa640ab2da92b628bf886c55c10d373f02bd6169d8979345c1d5af3fdf22"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:7VMTIZSCF2M6CBQ42VZISUD7CQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dumbbell Stanane: A large-gap quantum spin Hall insulator","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Linyang Li, Mingwen Zhao, Xin Chen","submitted_at":"2015-05-16T14:20:58Z","abstract_excerpt":"Quantum spin Hall (QSH) effect is quite promising for applications in spintronics and quantum computations, but presently can only be achieved at ultralow temperature. Searching for large-gap QSH insulators is the key to increase the operating temperature. Using first-principles calculations, we demonstrate that the stable hydrogenated stanene with a dumbbell-like structure (DB stanane) has large topological nontrivial band gaps of 312 meV (gamma point) and 160 meV for bulk characterized by a topological invariant of Z2=1, due to the s-pxy band inversion. Helical gapless edge states appear in "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.04277","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":"2026-05-18T02:07:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eIx11QL7t2rSkR9OGYXTDoFEaNFs+sxsa6T9TlIXbX3RONQkTUd+8Dcvg6DqiLcR/AY7mfyG+ImlNsPlv7zZAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T21:40:58.504943Z"},"content_sha256":"0708b96bd7b6a85dd8ff2afa538aae7fbfd3eeb34daa53d54755bc61d100ee42","schema_version":"1.0","event_id":"sha256:0708b96bd7b6a85dd8ff2afa538aae7fbfd3eeb34daa53d54755bc61d100ee42"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7VMTIZSCF2M6CBQ42VZISUD7CQ/bundle.json","state_url":"https://pith.science/pith/7VMTIZSCF2M6CBQ42VZISUD7CQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7VMTIZSCF2M6CBQ42VZISUD7CQ/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":"2026-05-20T21:40:58Z","links":{"resolver":"https://pith.science/pith/7VMTIZSCF2M6CBQ42VZISUD7CQ","bundle":"https://pith.science/pith/7VMTIZSCF2M6CBQ42VZISUD7CQ/bundle.json","state":"https://pith.science/pith/7VMTIZSCF2M6CBQ42VZISUD7CQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7VMTIZSCF2M6CBQ42VZISUD7CQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:7VMTIZSCF2M6CBQ42VZISUD7CQ","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":"2b6b6499d60b869cdc033642b290792542416246e6a455fcec9bb5fade3ab1f2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-05-16T14:20:58Z","title_canon_sha256":"aa489f2835ea9f42459a78185e3bd33867aa60a89c7ca240da3158b2f95e4df0"},"schema_version":"1.0","source":{"id":"1505.04277","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.04277","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"arxiv_version","alias_value":"1505.04277v1","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.04277","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"pith_short_12","alias_value":"7VMTIZSCF2M6","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"7VMTIZSCF2M6CBQ4","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"7VMTIZSC","created_at":"2026-05-18T12:29:10Z"}],"graph_snapshots":[{"event_id":"sha256:0708b96bd7b6a85dd8ff2afa538aae7fbfd3eeb34daa53d54755bc61d100ee42","target":"graph","created_at":"2026-05-18T02:07:25Z","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":"Quantum spin Hall (QSH) effect is quite promising for applications in spintronics and quantum computations, but presently can only be achieved at ultralow temperature. Searching for large-gap QSH insulators is the key to increase the operating temperature. Using first-principles calculations, we demonstrate that the stable hydrogenated stanene with a dumbbell-like structure (DB stanane) has large topological nontrivial band gaps of 312 meV (gamma point) and 160 meV for bulk characterized by a topological invariant of Z2=1, due to the s-pxy band inversion. Helical gapless edge states appear in ","authors_text":"Linyang Li, Mingwen Zhao, Xin Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-05-16T14:20:58Z","title":"Dumbbell Stanane: A large-gap quantum spin Hall insulator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.04277","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:f0ceaa640ab2da92b628bf886c55c10d373f02bd6169d8979345c1d5af3fdf22","target":"record","created_at":"2026-05-18T02:07:25Z","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":"2b6b6499d60b869cdc033642b290792542416246e6a455fcec9bb5fade3ab1f2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-05-16T14:20:58Z","title_canon_sha256":"aa489f2835ea9f42459a78185e3bd33867aa60a89c7ca240da3158b2f95e4df0"},"schema_version":"1.0","source":{"id":"1505.04277","kind":"arxiv","version":1}},"canonical_sha256":"fd593466422e99e1061cd57289507f14185156e435d213dd60cd54be624a3d32","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fd593466422e99e1061cd57289507f14185156e435d213dd60cd54be624a3d32","first_computed_at":"2026-05-18T02:07:25.876928Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:25.876928Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q6WyIsl83YRmcMhe4kVy4cuDUYo1G9rARPijV/599C7L13c8ZQP2DYeIex5R30nkdxM0pRayMrgahq5fOCrJBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:25.877385Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.04277","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f0ceaa640ab2da92b628bf886c55c10d373f02bd6169d8979345c1d5af3fdf22","sha256:0708b96bd7b6a85dd8ff2afa538aae7fbfd3eeb34daa53d54755bc61d100ee42"],"state_sha256":"8e390ba58b73d68dba723adc73802bac30e1b1a996312c5745e74629a3b588af"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FaEO2pGL05R8VxcpMiySQpXob8d+RmT3wBOdNdk6SEdXM8P6UPrhJfkrog9uZu0bt5IqoFP5edYLfl3Wqa/5Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T21:40:58.506920Z","bundle_sha256":"693516af06364c90fdba8b9f17f0c59405243b7059595a032ed9c6201d12c188"}}