{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"ce81a2781c5de04c3aae5c08b93ebbaab85003bcf5239d5b49b0b605fc2d8f40","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["92cc3a219fc516644bf4545c618969ab6d58125d8d1856fe230f1d3c3b89375f","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"2c9ce202744f7399c375770d2de33dee7c468fefa913ee7354e357252820d134","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cm.insulator-quantum-oscillations.ybb12-neutral-fermions","kind":"well-posed","literature_status":"contested","n":"2","parents":[],"plain":"$\\mathrm{YbB_{12}}$ shows oscillations in resistance and magnetization, plus heat capacity and heat conduction that grow linearly with temperature as in a metal, while remaining electrically insulating.","posed_since":"2018","precise":"In $\\mathrm{YbB_{12}}$, quantum oscillations in resistivity and magnetization appear in the insulating state above $\\sim 3.5 \\times 10^{5}\\,\\mathrm{G}$ (Xiang et al. 2018), heat-capacity oscillations with frequency $\\sim 6.7 \\times 10^{6}\\,\\mathrm{G}$ were reported in 2025, and zero-field specific heat and thermal conductivity have linear-in-$T$ terms (Sato et al. 2019). Determine whether these signals come from a bulk Fermi surface of charge-neutral fermions.","problem_ref":"92cc3a219fc516644bf4545c618969ab6d58125d8d1856fe230f1d3c3b89375f","references":"","settled_by":"Thermal transport and heat-capacity oscillations on crystals of varied purity, showing the fermion contribution is bulk and independent of metallic inclusions.","status_note":"Heat-capacity oscillations at a frequency matching torque and transport, with amplitude about 13 percent of the linear specific-heat coefficient, were reported in 2025 (Chen et al., Physical Review Letters 135, 156501, arXiv 2501.07471).","title":"Does insulating $\\mathrm{YbB_{12}}$ host a Fermi surface of neutral fermions?","topic_ref":null},"content_withheld":"false","files":[],"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"b77f212c60f8240b1214fcb4c771c4bd48987ba3035672e02e94659f8d5b9039","schema":"pubphys.attested/1"},"id_token":null,"id_token_withheld":"false","envelope":{"attested_hash":"6853216720b7ecf65f31b637438520e62c267c1241e5aab66c4489b3e0bb6c30","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"m1qWPC0Xlqp1dtKx4cYFMu1IopiiDUIO1_p8Cr6ZlfL9rnotzbDim4j6nXdI3trbkiCzDhjGYlWI2cW0sUDAAQ"},"schema":"pubphys.envelope/1"},"ots":{"attested":["AE9wZW5UaW1lc3RhbXBzAABQcm9vZgC_ieLohOiSlAEIaFMhZyC37PZfMbY3Q4Ug5iwmfBJB5aq2bESJs-C7bDDwIGhfoFl_667fmyT8jV8tFnv-Jjfj1PtNOnVeNi8SHbsaCPEg0fbB2iRhIg6WTm3ShLkt3QN6_SL0mra1RdBZdVrlNo8I8CAbtFW9foE-Uvf-qNRtwyxyg0guTsa3NW7g-5IRjQKqBAjwIGT-SCjPsRxOvWSTfjkK-BHe6p3UgOnIW_jJJsEkzA-4CPAgifAC04JEf7t_zUawinVeIYMxbJ7rKE_SEp1_wd5cqK0I8SBcMw2pvf8wrDaCCWJ15laJajPIG2V10Awj6MCOsyTJQQjxIJ6xxSFbP5yKvGDsivHs5WdfqkpRl9d-xpUzY-9mzCvLCPAgNWsj73C-FdBKnM-YIq56Rzi4rZw0zXjVnprUdC52gz4I8SBcP9hQb3hxUiLf8dFx-DuqZHA2xkmG-c_qCFt8QfQHCAjwIOv_x0B6HyZ6WMHKeIf_d_EUIvwPGdZeVY-hXN3RLDM5CPEgHd9u6OIGCvUV12A1B1xdiOprSJ-4w0cqwfe7CzVX5HsI8CDQo_sIWZiWXaTGRSQBLmU-lHJKskYKqsjO1r02DhB8LAj_8Ajn9YmozHwo9QjwEJ46aM9ZDv3TdtqV3ZbRsNgI8SBOF8pILGf1kodr5MKmQs6Cd93joraGn3g6UPt_-kewPwjwIOG-gmM7bd_eR4AiDMNfluS3xvr7vicLR-sCBr5qtG2cCPAgrVNFrCoeQcCxhlmnE0BzHgR8HQpZAlfqzDDFzfWb8GUI8QRq0WWT8AjZJ2cF_c7k8ACD3-MNLvkMjiwraHR0cHM6Ly9ib2IuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZ_AI9ZMS1zxd7IEI8BDd00WgJZ0RncsC1Fyai_4aCPEgvxMFrnu7F05IW5INiraQ3OVEYMjNx6JfBxw1Q4jPLi4I8QRq0WWS8Ag2zxPAtI5JsP8Ag9_jDS75DI4uLWh0dHBzOi8vYWxpY2UuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZwjxIHAnv4KFFf4uiYEFJvLxiMxSyz8VowJP4roTfDD9h7bICPAgj5tgvbNF7mxSP4jGGE66ezUFRLnI4g1VTkvuV4VtCPAI8CCxlc1HuKORuHgn7DYIYcDhc4oo99OkTWBEvddBypoa7AjwIFcjjaF8kDNDYCZGaNISlRjvX-I7in-QNwsr4JYQbFJvCPAgnl0k4gs7LuY5i1umiHO-J7My3uBThLJUWQoY9LdVSrQI8SA6-Ft11_K_GqMNWYhkVsVqCFvXSYbp4S8JoLsLBnUzvgjxIBC8_mAE7JBP35SNxDBcG7joLJwURpMxdV2vSO64_jEOCPEge04Coj1xSi7CE8UwqiBGNhPyZ5QdD_YZwn-heSdObU4I8SBgdDSgr3VUx1j8m_pK7-OzMwwFgXeLy43ujffCv-hf5AjwIMl-PnAt4xjoBEVU4-nkyN0NKRa9AvX4kEMfllFyIJS9CPFZAQAAAAHz4rV-uwQFg02bVnEMUFgpIdGKjM4tWuID1kTVnrjisAAAAAAA_v___wJURAIAAAAAABYAFBFys2oc0-U-bYrC3VulGLzND5fbAAAAAAAAAAAiaiDwBHLTDgAICPEgMJIBYi46xOIuFDwzJ9nOx14ngW5HbglUf65ORpkoIYcICPAgHgGWEGCDHWgscwT92NOoJ7s-ezbPkyiWr2RnYZDC_dwICPAgtffMyyLu-MscJsDc0dzwGspwSrrmvVAnMNgsgWhHClgICPAgMUl1OfBDUwhp5VZjHwVA0nuz1F5HZTUJCHAnM1L1F3MICPAgStK7UWpnrUueV5EaE7uE0y6BLMp6EANmrbhrTqEBZu8ICPAg5LVW7IHtUL5mNOvPx1hOTfLMmqlQ7t9EFW-KDtrISIQICPAgABgXZ6upFU8qiDQKFtQFpqkjKwl0PsxM4JUjVLlDKbkICPAgEwb96FiOhjlbwI8GFZQ4a5GXwxs4bUdqVOMKrtBWV30ICPEgqBg-wp0c8CAPV9k6J7wIa9_GtQfpWmhpE1zqFZyi2pQICPAg2pZLTVPGJbriiz0UhMytYDVYAXOgQnWDcrMOewK9O8cICPEgxm3QwzbvT4siJzubQGnST67bWv-exYwSPP1KDi7CaUwICPEgm6udUudfjUaM0gUFTylKGDMypj7ptMTG0zmxd_T5yTcICPAgMpOInkjFCVp1pOZhfZnyPAl8hdWGmHzQcrGLgLwSKLgICAAFiJYNc9cZAQPzpjs"],"envelope":["AE9wZW5UaW1lc3RhbXBzAABQcm9vZgC_ieLohOiSlAEIx4eDXHtKW9uq4EuftdGtXFTDcSF1xBPi9C8J9FG0JozwIMeNonRqknfVsGveqkfrP9ijkKcRYrAuzyb47RtEI4ooCPEg4WZSkHk2MstQnqVyih56Y9a7IOwBKm4piVKGcVz8DEII8CDj3EFHLtJyE26Bgl6Q28s5cFNGxUF139K7jOHAHpr_UgjxIFkUmRNMQfRBRosziXvu79wPep-HNp6-XdAEbcMaUIroCPEgC4UBUk2r3p6N5ePHELIcf74Fc-UaEHAyQbIol04HlkII8CDgwxexIxmrpOhu1lJVX868FkmRS21yEDi-6oEm4lCQ5gjwIFN5Bsm0GrOfAbeKEdWABW0DwjhI5zX9zku3NWou5CmtCPAg5eqR4CU5l8kO1rB2qJB7mTDxO5KdiNtAiUft-v_2wc8I8CCSqAf0sn_1-kk9EDPXEZvjRff_ciLViVfMVybjDX1OsQjxID89HsXrUag9eRv04qSQX18D2ak5pxDN4H8m3_0Qkp84CPAg3mczMYDKOd7Nhf3ojA9ZvuTsN66Y1NnyYTp9j8GKQNwI8SCvAiiN-Hrv7IEejd8wdUihoozu5KOvpoBFJ0vg3UnGAQj_8Ajn9YmozHwo9QjwEJ46aM9ZDv3TdtqV3ZbRsNgI8SBOF8pILGf1kodr5MKmQs6Cd93joraGn3g6UPt_-kewPwjwIOG-gmM7bd_eR4AiDMNfluS3xvr7vicLR-sCBr5qtG2cCPAgrVNFrCoeQcCxhlmnE0BzHgR8HQpZAlfqzDDFzfWb8GUI8QRq0WWT8AjZJ2cF_c7k8ACD3-MNLvkMjiwraHR0cHM6Ly9ib2IuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZ_AI9ZMS1zxd7IEI8BDd00WgJZ0RncsC1Fyai_4aCPEgvxMFrnu7F05IW5INiraQ3OVEYMjNx6JfBxw1Q4jPLi4I8QRq0WWS8Ag2zxPAtI5JsP8Ag9_jDS75DI4uLWh0dHBzOi8vYWxpY2UuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZwjxIHAnv4KFFf4uiYEFJvLxiMxSyz8VowJP4roTfDD9h7bICPAgj5tgvbNF7mxSP4jGGE66ezUFRLnI4g1VTkvuV4VtCPAI8CCxlc1HuKORuHgn7DYIYcDhc4oo99OkTWBEvddBypoa7AjwIFcjjaF8kDNDYCZGaNISlRjvX-I7in-QNwsr4JYQbFJvCPAgnl0k4gs7LuY5i1umiHO-J7My3uBThLJUWQoY9LdVSrQI8SA6-Ft11_K_GqMNWYhkVsVqCFvXSYbp4S8JoLsLBnUzvgjxIBC8_mAE7JBP35SNxDBcG7joLJwURpMxdV2vSO64_jEOCPEge04Coj1xSi7CE8UwqiBGNhPyZ5QdD_YZwn-heSdObU4I8SBgdDSgr3VUx1j8m_pK7-OzMwwFgXeLy43ujffCv-hf5AjwIMl-PnAt4xjoBEVU4-nkyN0NKRa9AvX4kEMfllFyIJS9CPFZAQAAAAHz4rV-uwQFg02bVnEMUFgpIdGKjM4tWuID1kTVnrjisAAAAAAA_v___wJURAIAAAAAABYAFBFys2oc0-U-bYrC3VulGLzND5fbAAAAAAAAAAAiaiDwBHLTDgAICPEgMJIBYi46xOIuFDwzJ9nOx14ngW5HbglUf65ORpkoIYcICPAgHgGWEGCDHWgscwT92NOoJ7s-ezbPkyiWr2RnYZDC_dwICPAgtffMyyLu-MscJsDc0dzwGspwSrrmvVAnMNgsgWhHClgICPAgMUl1OfBDUwhp5VZjHwVA0nuz1F5HZTUJCHAnM1L1F3MICPAgStK7UWpnrUueV5EaE7uE0y6BLMp6EANmrbhrTqEBZu8ICPAg5LVW7IHtUL5mNOvPx1hOTfLMmqlQ7t9EFW-KDtrISIQICPAgABgXZ6upFU8qiDQKFtQFpqkjKwl0PsxM4JUjVLlDKbkICPAgEwb96FiOhjlbwI8GFZQ4a5GXwxs4bUdqVOMKrtBWV30ICPEgqBg-wp0c8CAPV9k6J7wIa9_GtQfpWmhpE1zqFZyi2pQICPAg2pZLTVPGJbriiz0UhMytYDVYAXOgQnWDcrMOewK9O8cICPEgxm3QwzbvT4siJzubQGnST67bWv-exYwSPP1KDi7CaUwICPEgm6udUudfjUaM0gUFTylKGDMypj7ptMTG0zmxd_T5yTcICPAgMpOInkjFCVp1pOZhfZnyPAl8hdWGmHzQcrGLgLwSKLgICAAFiJYNc9cZAQPzpjs"]},"log":{"leaf_index":"2874","tree_size":"3804","proof":["c4991e1f0a42244369a0b9a865975084abac05960f9298cf1628535a772c9e32","d02384963cf5c8d2d307f432247d79c0663fd02ff257dc66aef4dcfdb2ef51b0","a03f82a355ac9139a302527e8e8c4dc3ca69ee5c802d1ee2f6971e11b3a8f626","dd49757bffeade00cafd632edad65adfcc16e0e888d2fabe7941b5b965d50498","d9137725903187cd9f5f8f84478c02904e68909a68f3b8fb370165dbd9c908c8","744b2cb5b382e8f8988fa6e6e1e9f1fcae2d254471c37598dbd1e9d4cf5928f0","323cea358a3a8c2de393b15b814e7c2ae36cccb40b8dacbe21aab4e15da8014b","35943d50e127dd46c0e87af4e164fc8e3c68cc080e1e586a454baa6a53014e7a","56960156727d0f461a1b3857ab83f18526eaef848c820c927094afc1f989d56c","b0b232078d071c92816af6274529aef23a2ea1f41246694fec32d768cfa09dc8","325287f5a43e4f3ad4072ec4bd53d43c50c1393021a056122e9cb0fad83b868f","3c578dccc15502c5f3efe228cadc99fee76ab536ed01f66b14d316fdcc157429"],"checkpoint":"pubphys.com/log/v1\n3804\nAK6t4qgu96+M9wScTrIlsJ10d/zhKVEtYguyM3aeJvo=\n\n— pubphys.com/log/v1 JFPwIPP8EtoxgcsQg7V7CwIdL4UKPqJtpv+eB8sFNJjyQHIdyA1VabmBsPyLqq2bLxJPn57rA6fQi8y0QDDjRXHvlQg=\n","promise":"pubphys.com/log/v1 promise\n057bbf12101fff5de9d2fa9b57759febae1f9237ebc3196ab00202413d39f655\n2874\n2026-10-15T23:43:57Z\n2026-10-16T01:43:57Z\n\n— pubphys.com/log/v1 JFPwIFh3vZmCFijV1MvgIzmIPKW03Nx5clqR/AV45s3de9r/t3gNBVGGQX75mn2toV8YqKBPfcMXdtt/4jQ1NnZQyQY=\n"},"orcid_key_evidence":[],"attesting":null}