{"paper":{"title":"Andreev Reflection Like Enhancement Above Bulk $T_c$ in Electron Underdoped Iron Arsenides","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"C. R. Hunt, D. Y. Chung, H. Z. Arham, J. Gillett, L. H. Greene, M. G. Kanatzidis, S. D. Das, S. E. Sebastian","submitted_at":"2013-07-07T19:43:17Z","abstract_excerpt":"We use point contact spectroscopy (PCS) to probe the superconducting properties of electron doped $\\rm{Ba(Fe_{1-x}Co_x)_2As_2}$ ($\\rm{x = 0.05, 0.055, 0.07, 0.08}$) and hole doped $\\rm{Ba_{0.8}K_{0.2}Fe_2As_2}$. PCS directly probes the low energy density of states via Andreev reflection, revealing two distinct superconducting gaps in both compound families. Apart from the electron underdoped $\\rm{Ba(Fe_{1-x}Co_{x})_2As_2}$, the excess current due to Andreev reflection for the compounds follows the typical BCS temperature dependence. For underdoped $\\rm{Ba(Fe_{1-x}Co_{x})_2As_2}$, the temperatu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1908","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"}