{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:HS7VKLQ3L7HI2BDQFJA26IZI75","short_pith_number":"pith:HS7VKLQ3","canonical_record":{"source":{"id":"1509.03631","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-09-11T20:03:11Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"ca10a4f19e849f93dcdc2a68b43668eed17525c88ae7b0661ace799c5d1db10a","abstract_canon_sha256":"54d2e5ca41ce64ab64f5054409c1499f8b58d05e5b49fe25d61c452d3395791e"},"schema_version":"1.0"},"canonical_sha256":"3cbf552e1b5fce8d04702a41af2328ff7222fa97886d34d8a293c082d2ace37b","source":{"kind":"arxiv","id":"1509.03631","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03631","created_at":"2026-05-18T01:33:14Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03631v1","created_at":"2026-05-18T01:33:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03631","created_at":"2026-05-18T01:33:14Z"},{"alias_kind":"pith_short_12","alias_value":"HS7VKLQ3L7HI","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"HS7VKLQ3L7HI2BDQ","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"HS7VKLQ3","created_at":"2026-05-18T12:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:HS7VKLQ3L7HI2BDQFJA26IZI75","target":"record","payload":{"canonical_record":{"source":{"id":"1509.03631","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-09-11T20:03:11Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"ca10a4f19e849f93dcdc2a68b43668eed17525c88ae7b0661ace799c5d1db10a","abstract_canon_sha256":"54d2e5ca41ce64ab64f5054409c1499f8b58d05e5b49fe25d61c452d3395791e"},"schema_version":"1.0"},"canonical_sha256":"3cbf552e1b5fce8d04702a41af2328ff7222fa97886d34d8a293c082d2ace37b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:33:14.984205Z","signature_b64":"XYympL9NwPYQ+GX8/kqyo1zJiN8MGS8UawlnWUycOyG2FspFYjgcxgC0A6TaXQwHRV1IeBu5XAFa29pXN05KBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3cbf552e1b5fce8d04702a41af2328ff7222fa97886d34d8a293c082d2ace37b","last_reissued_at":"2026-05-18T01:33:14.983591Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:33:14.983591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.03631","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":"2026-05-18T01:33:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"naacEX6SbPdHZsxEj1mxQs3Un7+876zWomwyFUMAInEYqiZEz01V5J5yHMq9KPcuG4PxG01g6YkXy140hKYKBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T21:37:09.734166Z"},"content_sha256":"cf34162aea378ea6e4bf8862b8d89c6081d4ec5452bfc5e134682db6d6d5d9d2","schema_version":"1.0","event_id":"sha256:cf34162aea378ea6e4bf8862b8d89c6081d4ec5452bfc5e134682db6d6d5d9d2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:HS7VKLQ3L7HI2BDQFJA26IZI75","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Indirect-to-direct band-gap crossover in few-layer MoTe$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Alberto F. Morpurgo, Alberto Ubaldini, Ashish Arora, C\\'eline Barreteau, Enrico Giannini, Ignacio Guti\\'errez-Lezama, Marek Potemski","submitted_at":"2015-09-11T20:03:11Z","abstract_excerpt":"We study the evolution of the band-gap structure in few-layer MoTe$_2$ crystals, by means of low-temperature micro-reflectance (MR) and temperature-dependent photoluminescence (PL) measurements. The analysis of the measurements indicate that, in complete analogy with other semiconducting transition metal dichalchogenides (TMDs), the dominant PL emission peaks originate from direct transitions associated to recombination of excitons and trions. When we follow the evolution of the PL intensity as a function of layer thickness, however, we observe that MoTe$_2$ behaves differently from other semi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03631","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":"2026-05-18T01:33:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lLyV86nlADmFIYStpX4fgRnYaR9YIprxY+HsYMKuqjIOiZQW1iNACAknA5ZCNiFO8vsXymkQRWulKx2KwvOKBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T21:37:09.734816Z"},"content_sha256":"f3ad4201449fdc9187e5cde35a147591a48e68bbfdae177773e802d737772d8c","schema_version":"1.0","event_id":"sha256:f3ad4201449fdc9187e5cde35a147591a48e68bbfdae177773e802d737772d8c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HS7VKLQ3L7HI2BDQFJA26IZI75/bundle.json","state_url":"https://pith.science/pith/HS7VKLQ3L7HI2BDQFJA26IZI75/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HS7VKLQ3L7HI2BDQFJA26IZI75/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":"2026-06-06T21:37:09Z","links":{"resolver":"https://pith.science/pith/HS7VKLQ3L7HI2BDQFJA26IZI75","bundle":"https://pith.science/pith/HS7VKLQ3L7HI2BDQFJA26IZI75/bundle.json","state":"https://pith.science/pith/HS7VKLQ3L7HI2BDQFJA26IZI75/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HS7VKLQ3L7HI2BDQFJA26IZI75/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:HS7VKLQ3L7HI2BDQFJA26IZI75","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":"54d2e5ca41ce64ab64f5054409c1499f8b58d05e5b49fe25d61c452d3395791e","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-09-11T20:03:11Z","title_canon_sha256":"ca10a4f19e849f93dcdc2a68b43668eed17525c88ae7b0661ace799c5d1db10a"},"schema_version":"1.0","source":{"id":"1509.03631","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03631","created_at":"2026-05-18T01:33:14Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03631v1","created_at":"2026-05-18T01:33:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03631","created_at":"2026-05-18T01:33:14Z"},{"alias_kind":"pith_short_12","alias_value":"HS7VKLQ3L7HI","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"HS7VKLQ3L7HI2BDQ","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"HS7VKLQ3","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:f3ad4201449fdc9187e5cde35a147591a48e68bbfdae177773e802d737772d8c","target":"graph","created_at":"2026-05-18T01:33:14Z","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":"We study the evolution of the band-gap structure in few-layer MoTe$_2$ crystals, by means of low-temperature micro-reflectance (MR) and temperature-dependent photoluminescence (PL) measurements. The analysis of the measurements indicate that, in complete analogy with other semiconducting transition metal dichalchogenides (TMDs), the dominant PL emission peaks originate from direct transitions associated to recombination of excitons and trions. When we follow the evolution of the PL intensity as a function of layer thickness, however, we observe that MoTe$_2$ behaves differently from other semi","authors_text":"Alberto F. Morpurgo, Alberto Ubaldini, Ashish Arora, C\\'eline Barreteau, Enrico Giannini, Ignacio Guti\\'errez-Lezama, Marek Potemski","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-09-11T20:03:11Z","title":"Indirect-to-direct band-gap crossover in few-layer MoTe$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03631","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:cf34162aea378ea6e4bf8862b8d89c6081d4ec5452bfc5e134682db6d6d5d9d2","target":"record","created_at":"2026-05-18T01:33:14Z","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":"54d2e5ca41ce64ab64f5054409c1499f8b58d05e5b49fe25d61c452d3395791e","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-09-11T20:03:11Z","title_canon_sha256":"ca10a4f19e849f93dcdc2a68b43668eed17525c88ae7b0661ace799c5d1db10a"},"schema_version":"1.0","source":{"id":"1509.03631","kind":"arxiv","version":1}},"canonical_sha256":"3cbf552e1b5fce8d04702a41af2328ff7222fa97886d34d8a293c082d2ace37b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3cbf552e1b5fce8d04702a41af2328ff7222fa97886d34d8a293c082d2ace37b","first_computed_at":"2026-05-18T01:33:14.983591Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:33:14.983591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XYympL9NwPYQ+GX8/kqyo1zJiN8MGS8UawlnWUycOyG2FspFYjgcxgC0A6TaXQwHRV1IeBu5XAFa29pXN05KBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:33:14.984205Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.03631","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cf34162aea378ea6e4bf8862b8d89c6081d4ec5452bfc5e134682db6d6d5d9d2","sha256:f3ad4201449fdc9187e5cde35a147591a48e68bbfdae177773e802d737772d8c"],"state_sha256":"45f37ebb89bac0cc8ad84194427769d3adb53d07c564df81b10e39804e87a17e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M1QHwQ0ODxyL7bsT3QpharTDpGkKmYFa0a2lYo8HQ0lT2XXhU9AJuH2EMSngmdmkY1TsOy77XXIAE4I4qvVgAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T21:37:09.737741Z","bundle_sha256":"23f89cd4f889c5bbf9c011ff2b584056c17c6d1a1ea8e591f87a5e4c03366563"}}