{"paper":{"title":"Comment on \"Linear Scaling of the Exciton Binding Energy versus the Band Gap of Two-Dimensional Materials\"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Gang Lu, Ling-Yi Huang, Mingliang Zhang, Xu Zhang","submitted_at":"2016-09-13T21:59:16Z","abstract_excerpt":"In a recent letter [J. -H. Choi et al. Phys. Rev. Lett. 115, 066403 (2015)], a universal linear relation between the binding energy Eb of exciton and the band gap Eg is found in different quasi-2D semiconductors. However, when one extrapolates the straight line to Eg=0, a positive Eb is obtained. This means that a stable exciton exists in a metal (Eg=0), or in other words, the excitation energy is negative. Therefore, for quasi-2D semiconductors with small band gap, Eb vs. Eg must deviate from the straight line suggested in the Letter.\n  We performed similar GW+BSE calculation as the Letter fo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.05238","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"}