{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:MN43USV3QMOTUE2NHVPOM5KV7K","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":"26b751ad379873823b105e8e5d27d94020075586fda8dc48056e90b7b360aa2f","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.str-el","submitted_at":"2022-06-09T18:00:06Z","title_canon_sha256":"fdd30981cb96548c7bf486139539920a9632c656e1341241dd2eff10dde8a0b3"},"schema_version":"1.0","source":{"id":"2206.04704","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2206.04704","created_at":"2026-07-05T06:01:11Z"},{"alias_kind":"arxiv_version","alias_value":"2206.04704v1","created_at":"2026-07-05T06:01:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2206.04704","created_at":"2026-07-05T06:01:11Z"},{"alias_kind":"pith_short_12","alias_value":"MN43USV3QMOT","created_at":"2026-07-05T06:01:11Z"},{"alias_kind":"pith_short_16","alias_value":"MN43USV3QMOTUE2N","created_at":"2026-07-05T06:01:11Z"},{"alias_kind":"pith_short_8","alias_value":"MN43USV3","created_at":"2026-07-05T06:01:11Z"}],"graph_snapshots":[{"event_id":"sha256:b8dd12a52586aa2860148814040128ce0539a6d912c298ad50c6099f3c613fc3","target":"graph","created_at":"2026-07-05T06:01:11Z","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/2206.04704/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Electrons can form a two-dimensional electron gas at metal surfaces, where lateral confinement leads to quantum-well states. Such states have been observed for highly itinerant electrons, but it remains an open question whether quantum-well states can be formed from strongly correlated electrons. Here we study atomically flat terraces on surfaces of the heavy-fermion superconductor URu$_2$Si$_2$ using millikelvin scanning tunneling spectroscopy. We observe two-dimensional heavy fermions (2DHF) with an effective mass 17 times the free electron mass that form quantized states separated by a frac","authors_text":"Alfredo Levy Yeyati, Dai Aoki, Edwin Herrera-Vasco, Georg Knebel, Hermann Suderow, Isabel Guillam\\'on, Jacques Flouquet, Jan Rusz, Jean Pascal Brison, Jose Augusto Galvis, Peter M. Oppeneer, V\\'ictor Barrena, William Herrera","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.str-el","submitted_at":"2022-06-09T18:00:06Z","title":"Quantum-well states at the surface of the heavy-fermion superconductor URu$_2$Si$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2206.04704","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:c0ee8015d5740df62ea1de26d61335dd1a55aaddae0a2c699804a9616bf34740","target":"record","created_at":"2026-07-05T06:01:11Z","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":"26b751ad379873823b105e8e5d27d94020075586fda8dc48056e90b7b360aa2f","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.str-el","submitted_at":"2022-06-09T18:00:06Z","title_canon_sha256":"fdd30981cb96548c7bf486139539920a9632c656e1341241dd2eff10dde8a0b3"},"schema_version":"1.0","source":{"id":"2206.04704","kind":"arxiv","version":1}},"canonical_sha256":"6379ba4abb831d3a134d3d5ee67555fa9528662913530ff8cb953122e72d34d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6379ba4abb831d3a134d3d5ee67555fa9528662913530ff8cb953122e72d34d1","first_computed_at":"2026-07-05T06:01:11.884352Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:01:11.884352Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BV2jmDX8BKZ6EKD68282aDeVE/+TLnTNCquZy0d6LJOyWxqY6mUHL8USkdRsNvE1/dy18wIMbh3WJya4PR6SAw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:01:11.884896Z","signed_message":"canonical_sha256_bytes"},"source_id":"2206.04704","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c0ee8015d5740df62ea1de26d61335dd1a55aaddae0a2c699804a9616bf34740","sha256:b8dd12a52586aa2860148814040128ce0539a6d912c298ad50c6099f3c613fc3"],"state_sha256":"bd3b65b095170f93f7879040b209b9c1dea98a54b62c28b73bdd088389ee1e65"}