{"paper":{"title":"The nature of the phase transition in the cuprates as revealed by a magnetic field free stiffness meter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Amit Keren, Itzik Kapon, Nir Gavish, Thomas Prokscha, Zaher Salman","submitted_at":"2018-08-14T18:00:01Z","abstract_excerpt":"A new method to measure the superconducting stiffness tensor $\\overline{\\rho}_s$, without subjecting the sample to magnetic field, is applied to La$_{1.875}$Sr$_{0.125}$CuO$_4$ (LSCO). The method is based on the London equation $\\bf{J}=-\\overline{\\rho}_s \\bf{A}$, where $\\bf{J}$ is the current density and $\\bf{A}$ is the vector potential. Using rotor free $\\bf{A}$ and measuring $\\bf{J}$ via the magnetic moment of superconducting rings, we extract $\\overline{\\rho}_s$ at $T\\rightarrow T_c$. The technique, named Stiffnessometer, is sensitive to very small stiffness, which translates to penetration"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.04820","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":""},"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"}