Publication

Atomic structure at the Si(001)-SiO2 interface: from the interpretation of Si 2p core-level shifts to a model structure

Alfredo Pasquarello
2002
Journal Articles

Abstract

After assessing the current status concerning the interpretation of Si 2p core-level shifts in Si-O systems, we model the atomic structure of the Si(001)-SiO2 interface using recent photoemission data obtained with synchrotron radiation. Our model structure reproduces the amount, the distribution, and the location of silicon atoms in intermediate states of oxidation. Our model also shows a SiO2 density in the neighborhood of the interface consistent with X-ray reflectivity measurements. (C) 2002 Elsevier Science B.V. All rights reserved.

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https://infoscience.epfl.ch/entities/publication/6269b9d0-646b-48e0-882e-4b3db9f00f96

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Alfredo Pasquarello
2002
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/6269b9d0-646b-48e0-882e-4b3db9f00f96

About this result

Related concepts (32)

Silicon

Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive. Because of its high chemical affinity for oxygen, it was not until 1823 that Jöns Jakob Berzelius was first able to prepare it and characterize it in pure form.

Synchrotron light source

A synchrotron light source is a source of electromagnetic radiation (EM) usually produced by a storage ring, for scientific and technical purposes. First observed in synchrotrons, synchrotron light is now produced by storage rings and other specialized particle accelerators, typically accelerating electrons. Once the high-energy electron beam has been generated, it is directed into auxiliary components such as bending magnets and insertion devices (undulators or wigglers) in storage rings and free electron lasers.

Synchrotron radiation

Synchrotron radiation (also known as magnetobremsstrahlung radiation) is the electromagnetic radiation emitted when relativistic charged particles are subject to an acceleration perpendicular to their velocity (a ⊥ v). It is produced artificially in some types of particle accelerators or naturally by fast electrons moving through magnetic fields. The radiation produced in this way has a characteristic polarization, and the frequencies generated can range over a large portion of the electromagnetic spectrum.

Related publications (1)

Atomic structure at the Si(001)-SiO2 interface: from the interpretation of Si 2p core-level shifts to a model structure

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Formation and properties of nanometer-thick platinum silicide layers