Field emission properties of carbon nanowires from ab initio calculations

Anno: 1999

Autori: Bianchetti M., Buonsante P., Ginelli F., Lorenzoni A., Roman H.E., Broglia R.A.

Affiliazione autori: 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.

Titolo Convegno:
Luogo:

Volume: 486      Da Pagina: 448  A: 451

Parole chiavi: density functional theory; carbon chains; field-emission

Citazioni: 2
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-21
Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
Link per visualizzare la scheda su IsiWeb: Clicca qui
Link per visualizzare la citazioni su IsiWeb: Clicca qui