Phonon confinement and interface lattice dynamics of ultrathin high-k rare earth sesquioxide films: the case of Eu2O3 on YSZ(001)

Author:

Stankov Svetoslav12ORCID,Merkel Dániel G.34ORCID,Kalt Jochen12ORCID,Göttlicher Jörg1,Łażewski Jan5ORCID,Sternik Małgorzata5ORCID,Jochym Paweł T.5ORCID,Piekarz Przemysław5ORCID,Baumbach Tilo12,Chumakov Aleksandr I.6,Rüffer Rudolf6ORCID

Affiliation:

1. Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany

2. Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany

3. Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525 Budapest, Hungary

4. Centre for Energy Research, POB 49, H-1525 Budapest, Hungary

5. Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Kraków, Poland

6. ESRF-The European Synchrotron, F-38043 Grenoble, France

Abstract

We demonstrate that sub-nanometer-thick layers exhibiting exotic crystal phases that might form at the interface between two materials constitute a source of novel vibrational dynamics of thin films and multilayers.

Funder

Narodowe Centrum Nauki

Bundesministerium für Bildung und Forschung

Helmholtz Association

Ministerstwo Edukacji i Nauki

Publisher

Royal Society of Chemistry (RSC)

Subject

General Engineering,General Materials Science,General Chemistry,Atomic and Molecular Physics, and Optics,Bioengineering

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