Growth and characterization of semiconducting Fe-Si2 thin layers on Si(111)

Angela Rizzi; Heiko D. Moritz; Hans Luth

doi:10.1117/12.24298

1 March 1991 Growth and characterization of semiconducting Fe-Si2 thin layers on Si(111)

Angela Rizzi, Heiko D. Moritz, Hans Luth

Proceedings Volume 1361, Physical Concepts of Materials for Novel Optoelectronic Device Applications I: Materials Growth and Characterization; (1991) https://doi.org/10.1117/12.24298
Event: Physical Concepts of Materials for Novel Optoelectronic Device Applications, 1990, Aachen, Germany

Abstract

Semiconducting FeSi2 thin layers have been grown on Si(111) by solid state reaction under UHY conditions. The different reaction steps in the temperature range 380 750C were followed in-situ by Auger Electron Spectroscopy (AES). FeSi2 is formed between 550 and 680 C. The low energy excitation spectra of the thin FeSi2 layers were measured by High Resolution Electron Energy Loss Spectroscopy (HREELS). Surface phonon excitations at 50 meV energy are observed and explained in the framework of dielectric theory of surface scattering. The presence of the Fuchs-Kliewer surface phonons in the HREELS spectra gives evidence of the semiconducting character of the FeSi2 overlayer. In the higher energy range a broad loss structure occurs corresponding to the excitation of electronic interband transitions. The onset of this structure at 0. 8 eV gives an indication of the band gap energy of the silicide. Its intensity together with the small experimental q11 transfer is an evidence of a direct band gap for the FeSi2 layer.

Citation Download Citation

Angela Rizzi, Heiko D. Moritz, and Hans Luth "Growth and characterization of semiconducting Fe-Si2 thin layers on Si(111)", Proc. SPIE 1361, Physical Concepts of Materials for Novel Optoelectronic Device Applications I: Materials Growth and Characterization, (1 March 1991); https://doi.org/10.1117/12.24298

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available