Evidence of Eightfold Coordination for Co Atoms at the Co<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Si</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>/Si(111) Interface

G. Rossi; X. Jin; A. Santaniello; P. DePadova; D. Chandesris

doi:10.1103/PhysRevLett.62.191

Evidence of Eightfold Coordination for Co Atoms at the Co ${Si}_{2}$ /Si(111) Interface

G. Rossi, X. Jin, A. Santaniello, P. DePadova, and D. Chandesris

Phys. Rev. Lett. 62, 191 – Published 9 January 1989

Abstract

We have studied two-dimensional and three-dimensional Co ${Si}_{2}$ epitaxial layers on Si(111) by polarization-dependent surface extended x-ray-absorption fine structure on the Co $K$ edge (7707 eV). The Co interface atoms are coordinated with eight Si atoms, as in bulk Co ${Si}_{2}$ , with an interface bond length of 2.35(0.03) Å. Ultrathin three-dimensional Co ${Si}_{2}$ layers are 2.5% contracted in the direction perpendicular to the interface.

Received 22 June 1988

DOI:https://doi.org/10.1103/PhysRevLett.62.191

Authors & Affiliations

G. Rossi, X. Jin^*, A. Santaniello, P. DePadova, and D. Chandesris

Laboratoire pour l'Utilisation du Rayonnement Electromangetique, Centre National de la Recherche Scientifique, Commissariat à l'Energie Atomique, Ministère de l'Education Nationale, Université de Paris-Sud, F-91405 Orsay, France

^*Permanent address: Physics Department, Fudan University, Shanghai, China.

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Comment on ‘‘Evidence of eightfold coordination for Co atoms at the ${CoSi}_{2}$ /Si(111) interface’’

J. Zegenhagen, R. T. Tung, J. R. Patel, and P. E. Freeland

Phys. Rev. Lett. 64, 980 (1990)

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Vol. 62, Iss. 2 — 9 January 1989

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Physical Review Letters

Evidence of Eightfold Coordination for Co Atoms at the CoSi2/Si(111) Interface

G. Rossi, X. Jin, A. Santaniello, P. DePadova, and D. Chandesris

Phys. Rev. Lett. 62, 191 – Published 9 January 1989

Abstract

Authors & Affiliations

Comments & Replies

Comment on ‘‘Evidence of eightfold coordination for Co atoms at the CoSi2/Si(111) interface’’

J. Zegenhagen, R. T. Tung, J. R. Patel, and P. E. Freeland

Phys. Rev. Lett. 64, 980 (1990)

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Evidence of Eightfold Coordination for Co Atoms at the Co ${Si}_{2}$ /Si(111) Interface

Comment on ‘‘Evidence of eightfold coordination for Co atoms at the ${CoSi}_{2}$ /Si(111) interface’’