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Huber, Takashi Taniguchi, Thibault Charpentier, Wenjie Zhou, Yifan Jiang, Yi Guo, Youngjoon Choi, Zexing Chen","cross_cats":["cond-mat.mtrl-sci","cond-mat.str-el"],"headline":"Cryogenic shock exfoliation produces large rhombohedral graphene flakes enabling devices with over 200 micrometer electron mean free paths.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2026-04-23T17:56:37Z","title":"Cryogenic shock exfoliation for ultrahigh mobility rhombohedral graphite nanoelectronics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2604.21912","kind":"arxiv","version":2},"verdict":{"created_at":"2026-05-09T20:05:57.907764Z","id":"2731d5c9-cd6e-4d0e-8c30-236902de32d8","model_set":{"reader":"grok-4.3"},"one_line_summary":"Cryogenic shock exfoliation yields large rhombohedral graphene devices over 1300 square micrometers with 90% fabrication yield, mean free path exceeding 200 micrometers, and signatures of electron hydrodynamics.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"Cryogenic shock exfoliation produces large rhombohedral graphene flakes enabling devices with over 200 micrometer electron mean free paths.","strongest_claim":"Transverse magnetic focusing reveals a disorder mean free path exceeding 200 μm at low temperatures, with uniform spin magnetism over 10x10 μm² areas and a size-driven crossover from Poiseuille to porous electron flow.","weakest_assumption":"That cryogenic shock exfoliation and low-pressure van der Waals assembly preserve rhombohedral stacking order without introducing defects or altering the electronic band structure in ways that affect the observed high mobility and hydrodynamics."}},"verdict_id":"2731d5c9-cd6e-4d0e-8c30-236902de32d8"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:ecc35f3b5c6db3ee896a14d895c6f978ed76c658671a18e638da88229ee3d668","target":"record","created_at":"2026-07-07T03:18:56Z","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":"82bf1b5873bc26046f06f954b9f49703aefa00d586db94cdb37d8897f4f09dba","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.str-el"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2026-04-23T17:56:37Z","title_canon_sha256":"824565da162139af1745a5281090ba7e0ff4ebd172e2ff9d32f65cccab6b17ed"},"schema_version":"1.0","source":{"id":"2604.21912","kind":"arxiv","version":2}},"canonical_sha256":"5908582cf89b93e5224b8a198bdc0574f75c0a1917cce1d9a369f19141b5db0e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5908582cf89b93e5224b8a198bdc0574f75c0a1917cce1d9a369f19141b5db0e","first_computed_at":"2026-07-07T03:18:56.111444Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-07T03:18:56.111444Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bIGp8t71fJ9Rb4Sueca31JHpbDHi7ylCGXTiZT9GvFEKgy+aGMeCJN1YNfTmt2a3imdat+/XCBRle8xu16WhDw==","signature_status":"signed_v1","signed_at":"2026-07-07T03:18:56.111977Z","signed_message":"canonical_sha256_bytes"},"source_id":"2604.21912","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:abd58f3a4f111b4e5917f28df5129640cdce303dd040af51d7ba438207b30a28","sha256:ecc35f3b5c6db3ee896a14d895c6f978ed76c658671a18e638da88229ee3d668","sha256:109052416624863d35e6511334cbbe332a92424d166dc968efff8c05fd5fd0d7"],"state_sha256":"76c777a2ec5c9bb80b7c7dfef8408b91edd1393f1004e7759443283f032bf57e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xyok4iA3Q4qDDsoCv3dqE0Zu0srVeF6gXGKsVZdKCPn5TQjALKrtjkb+CoREOpk8XP0ylmOM4AKlSbB29dZADw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-27T15:17:15.390630Z","bundle_sha256":"4be93d397289208fd3aa566698c931982712bc6ef363fbbe32d3b4c3fc0594b0"}}