J. Phys. Colloques
Volume 50, Numéro C8, Novembre 198936th International Field Emission Symposium
|Page(s)||C8-229 - C8-234|
J. Phys. Colloques 50 (1989) C8-229-C8-234
SCANNING TUNNELING MICROSCOPY STUDY OF ALKALI METAL ADSORPTION ON THE Si (001) 2x1 SURFACEY. HASEGAWA1, T. HASHIZUME1, I. KAMIYA1, T. IDE1, I. SUMITA1, S. HYODO1, T. SAKURAI1, H. TOCHIHARA1, M. KUBOTA1 et Y. MURATA1
1 STM Group, The Institute for Solid State Physics, The University of Tokyo, Roppongi, Minato-ku, Tokyo 106, Japan
Li and K adsorption on the Si(001)2x1 surface has been investigated by field ion-scanning tunneling microscopy (FI-STM). The STM images have shown that at the initial stage of adsorption Li (K) atoms (1) adsorb on top of one of the dimer forming Si surface atoms and stabilize asymmetric (buckled) dimerization and (2) form linear chains, perpendicular to the substrate 2x1 dimer rows. Our observations suggest that alkali metal adsorption on the Si(001)2x1 surface may be significantly different from the conclusions of earlier reports.