Physical Sciences and Mathematics Commons^™

The Evolution Of Ga And As Core Levels In The Formation Of Fe/Gaas (001): A High Resolution Soft X-Ray Photoelectron Spectroscopic Study, Tiehan H. Shen, Denis Greig, Mark Hopkinson, George Daniel Waddill, Jamie D. W. Thompson, James R. Neal, Simon A. Morton, James G. Tobin, Jim A. D. Matthew

Physics Faculty Research & Creative Works

A high resolution soft x-ray photoelectron spectroscopic study of Ga and as 3d core levels has been conducted for Fe/GaAs (001) as a function of Fe thickness. This work has provided unambiguous evidence of substrate disrupting chemical reactions induced by the Fe overlayer—a quantitative analysis of the acquired spectra indicates significantly differing behavior of Ga and as during Fe growth, and our observations have been compared with existing theoretical models. Our results demonstrate that the outdiffusing Ga and as remain largely confined to the interface region, forming a thin intermixed layer. Whereas at low coverages Fe has little influence on …