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

Lookup NU author(s): Dr Yimin Chao, Professor Lidija Siller

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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.

Publication metadata

Author(s): Siller L; Chao Y; Svensson K; Radosavkic D; Dhanak VR; Hunt MRC

Publication type: Article

Publication status: Published

Journal: Physical Review B

Year: 2002

Volume: 66

Issue: 7

ISSN (print): 1098-0121

ISSN (electronic): 1550-235X

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevB.66.075323

DOI: 10.1103/PhysRevB.66.075323

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