Publication

Pulsed laser deposition for in-situ photoemission studies on YBa2Cu3O7-delta and related oxide films

Giorgio Margaritondo, Marco Grioni, Davor Pavuna, Daniel Ariosa Dupont
1998
Conference Papers

Abstract

We describe a new pulsed laser deposition (PLD) system that is linked to an angle-resolved photoemission (ARPES) chamber at the Synchrotron Radiation Center (SRC) in Wisconsin, USA. We also discuss our first results on epitaxially grown YBa2Cu3O7-delta (YBCO) films. The core level photoemission data indicate that a Be-oxide layer is the dominant surface layer. We were not able to reproducibly detect a sharp fermi edge in the photoemission spectra and thus conclude that the surface layer is non-metallic, probably due to oxygen loss at the surface. The absence of screening of the Y and Ba core levels is a further argument for this conclusion. Further experiments with ozone treated film surfaces are currently under way.

Official source

https://infoscience.epfl.ch/entities/publication/09f23671-bb15-4233-ad3e-48049b572dfd

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Giorgio Margaritondo, Marco Grioni, Davor Pavuna, Daniel Ariosa Dupont
1998
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/09f23671-bb15-4233-ad3e-48049b572dfd

About this result

Related concepts (32)

X-ray photoelectron spectroscopy

X-ray photoelectron spectroscopy (XPS) is a surface-sensitive quantitative spectroscopic technique based on the photoelectric effect that can identify the elements that exist within a material (elemental composition) or are covering its surface, as well as their chemical state, and the overall electronic structure and density of the electronic states in the material. XPS is a powerful measurement technique because it not only shows what elements are present, but also what other elements they are bonded to.

Photoemission spectroscopy

Photoemission spectroscopy (PES), also known as photoelectron spectroscopy, refers to energy measurement of electrons emitted from solids, gases or liquids by the photoelectric effect, in order to determine the binding energies of electrons in the substance. The term refers to various techniques, depending on whether the ionization energy is provided by X-ray, XUV or UV photons. Regardless of the incident photon beam, however, all photoelectron spectroscopy revolves around the general theme of surface analysis by measuring the ejected electrons.

Angle-resolved photoemission spectroscopy

Angle-resolved photoemission spectroscopy (ARPES) is an experimental technique used in condensed matter physics to probe the allowed energies and momenta of the electrons in a material, usually a crystalline solid. It is based on the photoelectric effect, in which an incoming photon of sufficient energy ejects an electron from the surface of a material. By directly measuring the kinetic energy and emission angle distributions of the emitted photoelectrons, the technique can map the electronic band structure and Fermi surfaces.

Related publications (32)

Pulsed laser deposition for in-situ photoemission studies on YBa2Cu3O7-delta and related oxide films

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