{"paper":{"title":"Anisotropic upper critical field and a possible Fulde-Ferrel-Larkin-Ovchinnikov state in a stoichiometric pnictide superconductor LiFeAs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"A. Gurevich, C. C. Agosta, H. Kim, K. Cho, M. A. Tanatar, R. Prozorov, W. A. Coniglio, Y. J. Song, Y. S. Kwon","submitted_at":"2010-11-23T15:04:31Z","abstract_excerpt":"Measurements of the temperature and angular dependencies of the upper critical fields $H_{c2}$ of a stoichiometric single crystal LiFeAs in pulsed magnetic fields up to 50 T were performed using a tunnel diode resonator. Full $H^{\\parallel c}_{c2}(T)$ and $H^{\\bot c}_{c2}(T)$ curves with $H^{\\parallel c}_{c2}(0)=17 \\pm 1$ T, $H^{\\bot c}_{c2}(0)=26 \\pm 1$ T, and the anisotropy parameter ${\\gamma_H}(T) \\equiv H_{c2}^{\\bot c}/H_{c2}^{\\parallel c}$ decreasing from $\\approx 2.5$ at $T_c$ to 1.5 at $T\\ll T_c$ were observed. The results for both orientations are in excellent agreement with a theory o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.5126","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"}