Critical Delocalization Of Chiral Zero Energy Modes In Graphene
Abstract
Graphene subjected to chiral-symmetric disorder is believed to host zero energy modes (ZEMs) resilient to localization, as suggested by the renormalization group analysis of the underlying nonlinear sigma model. We report accurate quantum transport calculations in honeycomb lattices with in excess of 109 sites and fine meV resolutions. The Kubo dc conductivity of ZEMs induced by vacancy defects (chiral BDI class) is found to match 4e2/πh within 1% accuracy, over a parametrically wide window of energy level broadenings and vacancy concentrations. Our results disclose an unprecedentedly robust metallic regime in graphene, providing strong evidence that the early field-theoretical picture for the BDI class is valid well beyond its controlled weak-coupling regime.
Publication Date
8-31-2015
Publication Title
Physical Review Letters
Volume
115
Issue
10
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1103/PhysRevLett.115.106601
Copyright Status
Unknown
Socpus ID
84944110461 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84944110461
STARS Citation
Ferreira, Aires and Mucciolo, Eduardo R., "Critical Delocalization Of Chiral Zero Energy Modes In Graphene" (2015). Scopus Export 2015-2019. 109.
https://stars.library.ucf.edu/scopus2015/109