Naslov
Quantum mechanical analysis of the elastic propagation of electrons in the Au/Si system : application to ballistic electron emission microscopy

Autori
Reuter, Karsten ; Andres, Pedro ; Garcia-Vidal, Francisko ; Šestović, Dragan ; Flores, Fernando ; Heinz, Konrad

Izvornik
Physical review. B, Condensed matter and materials physics (1098-0121) 58 (1998), 20; 14036-14042

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
BEEM ; LCAO ; electron transport

Sažetak
We present a Green's function approach based on a LCAO scheme to compute the elastic propagation of electrons injected from a STM tip into a metallic film. The obtained 2D current distribution in real and reciprocal space furnish a good representation of the elastic component of Ballistic Electron Emission Microscopy (BEEM) currents. Since this component accurately approximates the total current in the near threshold region, this procedure allows --in contrast to prior analyses-- to take into account effects of the metal band structure in the modeling of these experiments. The Au band structure, and in particular its gaps appearing in the [111] and [100] directions provides a good explanation for the previously irreconcilable results of nanometric resolution and similarity of BEEM spectra on both Au/Si(111) and Au/Si(100).

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA