{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:QSLVWGJSHC5UFGPUZWNEGYC3OI","short_pith_number":"pith:QSLVWGJS","canonical_record":{"source":{"id":"1909.11688","kind":"arxiv","version":5},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-09-25T18:07:55Z","cross_cats_sorted":[],"title_canon_sha256":"42b3d3c4427568ae822ff492b7d7d1648a88761879c1d4e011893cb73608b8b1","abstract_canon_sha256":"9d41fb967b7cda7f6cf0b247e614f39c9087fc5779ed3fa5ba25e85c9db1f469"},"schema_version":"1.0"},"canonical_sha256":"84975b193238bb4299f4cd9a43605b721ca8ea952884b2974ebaec88dbdb87fa","source":{"kind":"arxiv","id":"1909.11688","version":5},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.11688","created_at":"2026-07-05T01:24:28Z"},{"alias_kind":"arxiv_version","alias_value":"1909.11688v5","created_at":"2026-07-05T01:24:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.11688","created_at":"2026-07-05T01:24:28Z"},{"alias_kind":"pith_short_12","alias_value":"QSLVWGJSHC5U","created_at":"2026-07-05T01:24:28Z"},{"alias_kind":"pith_short_16","alias_value":"QSLVWGJSHC5UFGPU","created_at":"2026-07-05T01:24:28Z"},{"alias_kind":"pith_short_8","alias_value":"QSLVWGJS","created_at":"2026-07-05T01:24:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:QSLVWGJSHC5UFGPUZWNEGYC3OI","target":"record","payload":{"canonical_record":{"source":{"id":"1909.11688","kind":"arxiv","version":5},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-09-25T18:07:55Z","cross_cats_sorted":[],"title_canon_sha256":"42b3d3c4427568ae822ff492b7d7d1648a88761879c1d4e011893cb73608b8b1","abstract_canon_sha256":"9d41fb967b7cda7f6cf0b247e614f39c9087fc5779ed3fa5ba25e85c9db1f469"},"schema_version":"1.0"},"canonical_sha256":"84975b193238bb4299f4cd9a43605b721ca8ea952884b2974ebaec88dbdb87fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:24:28.226511Z","signature_b64":"AyK7U6nUCc2F2PGFLG05U74OltLBkEVl4mSOmuLCFftEJ6iDlBFnXUWUnPH2pZIgiIv8sI1wyyoTMGbJXpbhCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84975b193238bb4299f4cd9a43605b721ca8ea952884b2974ebaec88dbdb87fa","last_reissued_at":"2026-07-05T01:24:28.226036Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:24:28.226036Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.11688","source_version":5,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:24:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8jP2/ji8/XBcDfBlt0kC34srz1mcIrxoEcaDpWYChhw+zQWphLcygchE7eSuhXziqrmqm5jPgycHpTw0yKZfCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:14:45.332236Z"},"content_sha256":"b23efba7ad4a937fdce5821ce1ef364daf5af87df51c4618f82f5497be446746","schema_version":"1.0","event_id":"sha256:b23efba7ad4a937fdce5821ce1ef364daf5af87df51c4618f82f5497be446746"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:QSLVWGJSHC5UFGPUZWNEGYC3OI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct observation of hole carrier density profiles and their light induced manipulation at the surface of Ge","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Suter, E. Stilp, K.H. Chow, T. Prokscha, Z. Salman","submitted_at":"2019-09-25T18:07:55Z","abstract_excerpt":"We demonstrate that, by using low-energy positive muon ($\\mu^+$) spin spectroscopy as a local probe technique, the profiles of free charge carriers can be directly determined in the accumulation/depletion surface regions of p- or n-type Ge wafers. The detection of free holes is accomplished by measuring the effect of the interaction of the free carriers with the $\\mu^+$ probe spin on the observable muon spin polarization. By tuning the energy of the low-energy $\\mu^+$ between 1 keV and 20 keV the near-surface region between 10 nm and 160 nm is probed. We find hole carrier depletion and electro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.11688","kind":"arxiv","version":5},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1909.11688/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:24:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"elTwg5QsYGRNRMr7WB4xW5q+aSiSCEYE+hrCtPejlisVkFEKAP7VrqczsYaEKWvVSnrbH+p7WnjGIalbo+IzAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:14:45.332716Z"},"content_sha256":"07f4e3bc5706a28f1612fb9be9038590c8928cfca8845865ee7e6e03ad13c2f5","schema_version":"1.0","event_id":"sha256:07f4e3bc5706a28f1612fb9be9038590c8928cfca8845865ee7e6e03ad13c2f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QSLVWGJSHC5UFGPUZWNEGYC3OI/bundle.json","state_url":"https://pith.science/pith/QSLVWGJSHC5UFGPUZWNEGYC3OI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QSLVWGJSHC5UFGPUZWNEGYC3OI/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":"2026-08-07T06:14:45Z","links":{"resolver":"https://pith.science/pith/QSLVWGJSHC5UFGPUZWNEGYC3OI","bundle":"https://pith.science/pith/QSLVWGJSHC5UFGPUZWNEGYC3OI/bundle.json","state":"https://pith.science/pith/QSLVWGJSHC5UFGPUZWNEGYC3OI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QSLVWGJSHC5UFGPUZWNEGYC3OI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:QSLVWGJSHC5UFGPUZWNEGYC3OI","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":"9d41fb967b7cda7f6cf0b247e614f39c9087fc5779ed3fa5ba25e85c9db1f469","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-09-25T18:07:55Z","title_canon_sha256":"42b3d3c4427568ae822ff492b7d7d1648a88761879c1d4e011893cb73608b8b1"},"schema_version":"1.0","source":{"id":"1909.11688","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.11688","created_at":"2026-07-05T01:24:28Z"},{"alias_kind":"arxiv_version","alias_value":"1909.11688v5","created_at":"2026-07-05T01:24:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.11688","created_at":"2026-07-05T01:24:28Z"},{"alias_kind":"pith_short_12","alias_value":"QSLVWGJSHC5U","created_at":"2026-07-05T01:24:28Z"},{"alias_kind":"pith_short_16","alias_value":"QSLVWGJSHC5UFGPU","created_at":"2026-07-05T01:24:28Z"},{"alias_kind":"pith_short_8","alias_value":"QSLVWGJS","created_at":"2026-07-05T01:24:28Z"}],"graph_snapshots":[{"event_id":"sha256:07f4e3bc5706a28f1612fb9be9038590c8928cfca8845865ee7e6e03ad13c2f5","target":"graph","created_at":"2026-07-05T01:24:28Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1909.11688/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We demonstrate that, by using low-energy positive muon ($\\mu^+$) spin spectroscopy as a local probe technique, the profiles of free charge carriers can be directly determined in the accumulation/depletion surface regions of p- or n-type Ge wafers. The detection of free holes is accomplished by measuring the effect of the interaction of the free carriers with the $\\mu^+$ probe spin on the observable muon spin polarization. By tuning the energy of the low-energy $\\mu^+$ between 1 keV and 20 keV the near-surface region between 10 nm and 160 nm is probed. We find hole carrier depletion and electro","authors_text":"A. Suter, E. Stilp, K.H. Chow, T. Prokscha, Z. Salman","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-09-25T18:07:55Z","title":"Direct observation of hole carrier density profiles and their light induced manipulation at the surface of Ge"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.11688","kind":"arxiv","version":5},"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:b23efba7ad4a937fdce5821ce1ef364daf5af87df51c4618f82f5497be446746","target":"record","created_at":"2026-07-05T01:24:28Z","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":"9d41fb967b7cda7f6cf0b247e614f39c9087fc5779ed3fa5ba25e85c9db1f469","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-09-25T18:07:55Z","title_canon_sha256":"42b3d3c4427568ae822ff492b7d7d1648a88761879c1d4e011893cb73608b8b1"},"schema_version":"1.0","source":{"id":"1909.11688","kind":"arxiv","version":5}},"canonical_sha256":"84975b193238bb4299f4cd9a43605b721ca8ea952884b2974ebaec88dbdb87fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84975b193238bb4299f4cd9a43605b721ca8ea952884b2974ebaec88dbdb87fa","first_computed_at":"2026-07-05T01:24:28.226036Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:24:28.226036Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AyK7U6nUCc2F2PGFLG05U74OltLBkEVl4mSOmuLCFftEJ6iDlBFnXUWUnPH2pZIgiIv8sI1wyyoTMGbJXpbhCw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:24:28.226511Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.11688","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b23efba7ad4a937fdce5821ce1ef364daf5af87df51c4618f82f5497be446746","sha256:07f4e3bc5706a28f1612fb9be9038590c8928cfca8845865ee7e6e03ad13c2f5"],"state_sha256":"9df6eccdd25feacc32ffa59e7a8ffaed13d0af42e2b1037d4e4169bb8af4a78d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Kad7OyhNir7Hs3jzZfkJDlEDvhg+Oyb+gpGHd7veG3RMAtqr0GDt8K7CZZT4xZPN+8lo/dPZNgU8Zw7AV3y2AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T06:14:45.337199Z","bundle_sha256":"051ba376fa94c39b8d48be5149337b5ebaeb964ca0d0967df83301982851bed5"}}