{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:VO6YNAHE5Y3CUHHBGVGODJ27MW","short_pith_number":"pith:VO6YNAHE","canonical_record":{"source":{"id":"1602.00317","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-01-31T20:56:16Z","cross_cats_sorted":[],"title_canon_sha256":"ecad434e393049f69a539cca56b30db4f1c2ff837c840e85d7ab133f2f6f8341","abstract_canon_sha256":"1960c6e1e4cb8a7502e13c174486d936d96679881551957f27b0d34402786007"},"schema_version":"1.0"},"canonical_sha256":"abbd8680e4ee362a1ce1354ce1a75f658b40fc8c962702a544b3d6c5c39f6796","source":{"kind":"arxiv","id":"1602.00317","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.00317","created_at":"2026-05-18T01:16:42Z"},{"alias_kind":"arxiv_version","alias_value":"1602.00317v1","created_at":"2026-05-18T01:16:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.00317","created_at":"2026-05-18T01:16:42Z"},{"alias_kind":"pith_short_12","alias_value":"VO6YNAHE5Y3C","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VO6YNAHE5Y3CUHHB","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VO6YNAHE","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:VO6YNAHE5Y3CUHHBGVGODJ27MW","target":"record","payload":{"canonical_record":{"source":{"id":"1602.00317","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-01-31T20:56:16Z","cross_cats_sorted":[],"title_canon_sha256":"ecad434e393049f69a539cca56b30db4f1c2ff837c840e85d7ab133f2f6f8341","abstract_canon_sha256":"1960c6e1e4cb8a7502e13c174486d936d96679881551957f27b0d34402786007"},"schema_version":"1.0"},"canonical_sha256":"abbd8680e4ee362a1ce1354ce1a75f658b40fc8c962702a544b3d6c5c39f6796","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:42.806396Z","signature_b64":"uF5lxAFReNgh1BbTJhXPXb3Ue0ThZ6UOi43fLSIHq1cvDztOITq3NiBVhMWe/5QOr0uw1xFm/mgvWQYyh5eoBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"abbd8680e4ee362a1ce1354ce1a75f658b40fc8c962702a544b3d6c5c39f6796","last_reissued_at":"2026-05-18T01:16:42.805885Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:42.805885Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.00317","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":"2026-05-18T01:16:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R1Msoc0zxERoWF/tI0GY0pN4QLqS4okp7CZnMxcvwMy9v8DGcZPQy0C1v/dYe83cRxun3hRMlUgkr/xVopyACA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T18:49:45.017706Z"},"content_sha256":"ed1775d4ced99cb2ac39ecc92fa82651787fbea22db0e1cc9f09bcd9f3ee753a","schema_version":"1.0","event_id":"sha256:ed1775d4ced99cb2ac39ecc92fa82651787fbea22db0e1cc9f09bcd9f3ee753a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:VO6YNAHE5Y3CUHHBGVGODJ27MW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photoluminescence and the gallium problem for highest-mobility GaAs/AlGaAs-based 2d electron gases","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"C. Reichl, F. Schl\\\"apfer, S. Faelt, W. Dietsche, W. Wegscheider","submitted_at":"2016-01-31T20:56:16Z","abstract_excerpt":"The quest for extremely high mobilities of 2d electron gases in MBE-grown heterostructures is hampered by the available purity of the starting materials, particularly of the gallium. Here we compare the role of different Ga lots having nominally the highest possible quality on the mobility and the photoluminescence (PL) of modulation doped single interface structures and find significant differences. A weak exciton PL reveals that the purity of the Ga is insufficient. No high mobility can be reached with such a lot with a reasonable effort. On the other hand, a strong exciton PL indicates a hi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.00317","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":"2026-05-18T01:16:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7AgLvMUaluhW4orw4C+hMIZjmwa6utj6b7UySGivYBaNLDm7YmD6JjPNHVOxW5wnZYxaH8G9UQ7r16+VVSjcCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T18:49:45.018402Z"},"content_sha256":"e04807f003bfbcc7be7f580e303ac8956b7ace3d2ed6df8fbb7a232b6f28b0ff","schema_version":"1.0","event_id":"sha256:e04807f003bfbcc7be7f580e303ac8956b7ace3d2ed6df8fbb7a232b6f28b0ff"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VO6YNAHE5Y3CUHHBGVGODJ27MW/bundle.json","state_url":"https://pith.science/pith/VO6YNAHE5Y3CUHHBGVGODJ27MW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VO6YNAHE5Y3CUHHBGVGODJ27MW/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":"2026-06-11T18:49:45Z","links":{"resolver":"https://pith.science/pith/VO6YNAHE5Y3CUHHBGVGODJ27MW","bundle":"https://pith.science/pith/VO6YNAHE5Y3CUHHBGVGODJ27MW/bundle.json","state":"https://pith.science/pith/VO6YNAHE5Y3CUHHBGVGODJ27MW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VO6YNAHE5Y3CUHHBGVGODJ27MW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:VO6YNAHE5Y3CUHHBGVGODJ27MW","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":"1960c6e1e4cb8a7502e13c174486d936d96679881551957f27b0d34402786007","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-01-31T20:56:16Z","title_canon_sha256":"ecad434e393049f69a539cca56b30db4f1c2ff837c840e85d7ab133f2f6f8341"},"schema_version":"1.0","source":{"id":"1602.00317","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.00317","created_at":"2026-05-18T01:16:42Z"},{"alias_kind":"arxiv_version","alias_value":"1602.00317v1","created_at":"2026-05-18T01:16:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.00317","created_at":"2026-05-18T01:16:42Z"},{"alias_kind":"pith_short_12","alias_value":"VO6YNAHE5Y3C","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VO6YNAHE5Y3CUHHB","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VO6YNAHE","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:e04807f003bfbcc7be7f580e303ac8956b7ace3d2ed6df8fbb7a232b6f28b0ff","target":"graph","created_at":"2026-05-18T01:16:42Z","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 quest for extremely high mobilities of 2d electron gases in MBE-grown heterostructures is hampered by the available purity of the starting materials, particularly of the gallium. Here we compare the role of different Ga lots having nominally the highest possible quality on the mobility and the photoluminescence (PL) of modulation doped single interface structures and find significant differences. A weak exciton PL reveals that the purity of the Ga is insufficient. No high mobility can be reached with such a lot with a reasonable effort. On the other hand, a strong exciton PL indicates a hi","authors_text":"C. Reichl, F. Schl\\\"apfer, S. Faelt, W. Dietsche, W. Wegscheider","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-01-31T20:56:16Z","title":"Photoluminescence and the gallium problem for highest-mobility GaAs/AlGaAs-based 2d electron gases"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.00317","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:ed1775d4ced99cb2ac39ecc92fa82651787fbea22db0e1cc9f09bcd9f3ee753a","target":"record","created_at":"2026-05-18T01:16:42Z","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":"1960c6e1e4cb8a7502e13c174486d936d96679881551957f27b0d34402786007","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-01-31T20:56:16Z","title_canon_sha256":"ecad434e393049f69a539cca56b30db4f1c2ff837c840e85d7ab133f2f6f8341"},"schema_version":"1.0","source":{"id":"1602.00317","kind":"arxiv","version":1}},"canonical_sha256":"abbd8680e4ee362a1ce1354ce1a75f658b40fc8c962702a544b3d6c5c39f6796","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"abbd8680e4ee362a1ce1354ce1a75f658b40fc8c962702a544b3d6c5c39f6796","first_computed_at":"2026-05-18T01:16:42.805885Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:42.805885Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uF5lxAFReNgh1BbTJhXPXb3Ue0ThZ6UOi43fLSIHq1cvDztOITq3NiBVhMWe/5QOr0uw1xFm/mgvWQYyh5eoBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:42.806396Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.00317","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed1775d4ced99cb2ac39ecc92fa82651787fbea22db0e1cc9f09bcd9f3ee753a","sha256:e04807f003bfbcc7be7f580e303ac8956b7ace3d2ed6df8fbb7a232b6f28b0ff"],"state_sha256":"5c6985019c78d826b76e5cb13e6bd2585691091b1d03bb9cf440f83835e214fb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ly0dIWCEbQyChaKSec+ID4ZDDFQAO1o/ZkEClN/pn7orA7eZBtGjhCqNya+OCxvVzO9zs7AGczBJgdRLgdi7Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T18:49:45.023350Z","bundle_sha256":"368779e146e9ab6c796019bd6ca6d4553998e8f94d4c86fcb3aea98654036a75"}}