{"paper":{"title":"Vertical absorption edge and universal onset conductance in semi-hydrogenated graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"C. Zhang, Lei Chen, Zhongshui Ma","submitted_at":"2009-11-11T02:38:36Z","abstract_excerpt":"We show that for graphene with any finite difference in the on-site energy between the two sub-lattices ($\\Delta$), The optical absorption edge is determined by the $\\Delta$. The universal conductance will be broken and the conductance near the band edge varies with frequency as $1/\\omega^2$. Moreover, we have identified another universal conductance for such systems without inversion symmetry, i.e., the onset conductance at the band edge is $% \\sigma_c=2\\sigma_0=\\pi e^2/2h$, independent of the size of the band gap. The total integrated optical response is nearly conserved despite of the openi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.2040","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"}