{"paper":{"title":"High density of states in the pseudogap phase of the cuprate superconductor HgBa$_2$CuO$_{4 + \\delta}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"Albin Demuer, Ana\\\"elle Legros, Anne Forget, Christophe Marcenat, Cl\\'ement Girod, David LeBoeuf, Doroth\\'ee Colson, Louis Taillefer, Thierry Klein","submitted_at":"2020-04-07T18:47:40Z","abstract_excerpt":"The specific heat $C$ of the single-layer cuprate superconductor HgBa$_2$CuO$_{4 + \\delta}$ was measured in an underdoped crystal with $T_{\\rm c} = 72$ K at temperatures down to $2$ K in magnetic fields up to $35$ T, a field large enough to suppress superconductivity at that doping ($p \\simeq 0.09$). In the normal state at $H = 35$ T, a residual linear term of magnitude $\\gamma = 12 \\pm 2$ mJ/K$^2$mol is observed in $C/T$ as $T \\to 0$, a direct measure of the electronic density of states. This high value of $\\gamma$ has two major implications. First, it is significantly larger than the value m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.03650","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2004.03650/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}