Photoemission spectroscopy of the evolution of In-terminated InP(100)-(2x4) as a function of temperature: Surface- and cluster-related In 4d lines

Chao, Y., Svensson, K., Radosavkic, D., Dhanak, V. R., Hunt, M. R. C. and Siller, L. (2002) Photoemission spectroscopy of the evolution of In-terminated InP(100)-(2x4) as a function of temperature: Surface- and cluster-related In 4d lines. Physical Review B, 66 (7). ISSN 1550-235X

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Abstract

The evolution of clean, In-terminated InP(100)-(2x4) surfaces is investigated by synchrotron-radiation-excited photoemission spectroscopy as a function of annealing temperature. As-prepared InP(100)-(2x4) surfaces are found to be free of metallic indium, and the 4d core level shows two clear surface components. A third, indium-cluster-related component appears after annealing above 360+/-10 degreesC, due to phosphorous desorption, and is accompanied by a corresponding reduction in intensity in the In-P surface component. Further annealing leads to a decrease in binding energy of the indium-cluster-related peak due to increased metallicity and hence core-hole screening in the clusters. The increasingly metallic nature of the indium clusters is also revealed by the appearance and growth of a Fermi edge in valence-band spectra.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Depositing User: Rachel Smith
Date Deposited: 09 May 2011 16:54
Last Modified: 17 Oct 2018 16:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/30065
DOI: 10.1103/PhysRevB.67.113401

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