Field emission properties of carbon nanowires from ab initio calculations
Authors: Bianchetti M., Buonsante P., Ginelli F., Lorenzoni A., Roman H.E., Broglia R.A.
Autors Affiliation: Dipartimento di Fisica, Università degli Studi di Milano
Abstract: The field emission (FE) characteristics of linear carbon chains, relevant for understanding FE properties of complex carbon-based nanostructures, are studied by means of self-consistent density functional calculations in the presence of a constant electric held, making use of pseudopotentials and the local density approximation (LDA). The transmission coefficient for electron tunneling through the LDA potential barrier to the vacuum is obtained within the WKB approximation. It is found that chain polarization has remarkable effects on the emission properties, yielding currents of the order of 1 mu A for a chain of 9 atoms under standard bias conditions. Such carbon chains may thus be seen as the atomic scale realization of metallic nanowires.
Volume: 486 Pages from: 448 to: 451
KeyWords: density functional theory; carbon chains; field-emissionCitations: 2data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-17References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here