{"paper":{"title":"Electrodynamics of granular aluminum from superconductor to insulator: observation of collective superconducting modes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A. Beno\\^it, A. Bideaud, A. Catalano, A. Gomez, A. Monfardini, F. Levy-Bertrand, F.Valenti, I.M. Pop, J. Goupy, L. Gr\\\"unhaupt, M. Calvo, N. Maleeva, O. Bourrion, O. Dupr\\'e, T. Grenet, T. Klein, U. v. Luepke","submitted_at":"2019-02-15T15:25:00Z","abstract_excerpt":"We report on a detailed study of the optical response and $T_c-\\rho$ phase diagram ($T_c$ being the superconducting critical temperature and $\\rho$ the normal state resistivity of the film) of granular aluminum, combining transport measurements and a high resolution optical spectroscopy technique. The $T_c-\\rho$ phase diagram is discussed as resulting from an interplay between the phase stiffness, the Coulomb repulsion and the superconducting gap $\\Delta$. We provide a direct evidence for two different types of well resolved sub-gap absorptions, at $\\omega_1\\simeq\\Delta$ and at $\\Delta\\lesssim"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.05843","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"}