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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/14374

Title: Theory of the electro-optical properties of graphene nanoribbons
Authors: GUNDRA, K
SHUKLA, A
Keywords: ELECTRONIC-STRUCTURE
CONJUGATED POLYMERS
STATE
EDGE
Issue Date: 2011
Publisher: AMER PHYSICAL SOC
Citation: PHYSICAL REVIEW B,83(7)-
Abstract: We present calculations of the optical absorption and electroabsorption spectra of graphene nanoribbons (GNRs) using a pi-electron approach, incorporating long-range Coulomb interactions within the Pariser-Parr-Pople-model Hamiltonian. The approach is carefully benchmarked by computing quantities, such as the band structure, electric-field-driven half-metallicity, and linear optical absorption spectra of GNRs of various types, and the results are in good agreement with those obtained using ab initio calculations. Our predictions on the linear absorption spectra for the transversely polarized photons provide a means to characterize GNRs by optical probes. We also compute the electroabsorption spectra of the zigzag GNRs and argue that it can be used to determine whether or not they have a magnetic ground state, thereby allowing the edge magnetism to be probed through nonmagnetic experiments.
URI: http://dx.doi.org/10.1103/PhysRevB.83.075413
http://dspace.library.iitb.ac.in/jspui/handle/100/14374
ISSN: 1098-0121
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