{"paper":{"title":"Discovery of the Type-II Superconductor Ta$_4$Rh$_2$C$_{1-\\delta}$ with a High Upper Critical Field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Fabian O. von Rohr, Harald O. Jeschke, Karolina Gornicka, Keyuan Ma, Sara L\\'opez-Paz, Tomasz Klimczuk","submitted_at":"2025-06-02T19:48:54Z","abstract_excerpt":"We report on the discovery of superconductivity in the previously unknown compound Ta$_4$Rh$_2$C$_{1-\\delta}$. Ta$_4$Rh$_2$C$_{1-\\delta}$ crystallizes in the $\\eta$-carbide structure type, in the cubic space group $Fd\\bar{3}m$ (No.227) with a unit cell parameter of $a = $ 11.7947 \\AA. Temperature-dependent magnetic susceptibility, resistivity, and specific heat capacity measurements reveal that Ta$_4$Rh$_2$C$_{1-\\delta}$ is a type-II bulk superconductor with a critical temperature of $T_{\\rm c}$ = 6.4 K, and a normalized specific heat jump $\\Delta C/\\gamma T_{\\rm c}$ = 1.56. Notably, we find T"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.02209","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2506.02209/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"}