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Lin","submitted_at":"2011-08-13T02:07:28Z","abstract_excerpt":"Point contact spectroscopy reveals a gap-like feature above the magnetic and structural transition temperatures for underdoped $Ba(Fe_{1-x}Co_x)_2As_2$, $SrFe_2As_2$ and $Fe_{1+y}Te$. The conductance spectrum starts showing an enhancement at temperatures as high as 177 K for $BaFe_2As_2$ ($T_N$ $\\sim$ 132 K) and 250 K for $SrFe_2As_2$ ($T_N$ $\\sim$ 192 K). Possible origins for this enhancement are discussed in light of recent experimental claims of nematicity in these materials. We construct a modified phase diagram for Co-doped Ba122 showing a gap-like feature existing above $T_N$ and $T_S$ f"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1108.2749","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2011-08-13T02:07:28Z","cross_cats_sorted":[],"title_canon_sha256":"efde18e7942ac657a55242d9de26a7321938cf87e3b9b4e37c505b906d3ca502","abstract_canon_sha256":"e17bc02bdf36a03be749dcd8928f1371cc0f174ac7a00c084530ed5436e46017"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:54.412487Z","signature_b64":"dsQ4dl5/jSkFMEtnR7jlwo9dbL4K1ZwbvJkcOlMfVB/ZrKvGueB/XhGVY0dpNMv3mMWq0V3S9LrIT/8wL4R8CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fea50e9d756f8078438067fa3bf8d993bad47308445469c8bff6033774f88575","last_reissued_at":"2026-05-18T02:00:54.411833Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:54.411833Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Gap-like feature in the normal state of $\\bf{X(Fe_{1-x}Co_x)_2As_2}$, $\\bf{X=Ba,Sr}$ and $\\bf{Fe_{1+y}Te}$ revealed by Point Contact Spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A. 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