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Polarization dependence of Schottky barrier heights at interfaces of ferroelectrics determined by photoelectron spectroscopy

Chen, Feng ; Klein, Andreas (2022)
Polarization dependence of Schottky barrier heights at interfaces of ferroelectrics determined by photoelectron spectroscopy.
In: Physical Review B, 2012, 86 (9)
doi: 10.26083/tuprints-00021177
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Polarization dependence of Schottky barrier heights at interfaces of ferroelectrics determined by photoelectron spectroscopy
Language: English
Date: 2022
Place of Publication: Darmstadt
Year of primary publication: 2012
Publisher: American Physical Society
Journal or Publication Title: Physical Review B
Volume of the journal: 86
Issue Number: 9
Collation: 7 Seiten
DOI: 10.26083/tuprints-00021177
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Origin: Secondary publication service
Abstract:

Ferroelectric polarization in thin films is stabilized by screening charges in the metal electrodes. Imperfect screening of the polarization charge strongly modifies the film's capacitance and should lead to a variation of the Schottky barrier height at the interface with polarization direction. An experimental approach based on photoelectron spectroscopy is introduced which allows us to quantitatively determine Schottky barrier heights at ferroelectric/metal interfaces in dependence on polarization. The procedure is exemplified for BaTiO₃ single crystals with RuO₂ and Pt electrodes, revealing a variation of Schottky barrier height of 1.1 and 0.65 eV in dependence on polarization for RuO₂ and Pt electrodes, respectively. Inhomogeneous barrier switching is observed for Pt electrodes, which may be related to defect formation during metal deposition.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-211773
Classification DDC: 500 Science and mathematics > 530 Physics
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Surface Science
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B7: Polarisation and charging in electrical fatigue ferroelectrics
Date Deposited: 22 Apr 2022 11:02
Last Modified: 09 Feb 2023 10:31
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21177
PPN: 50445384X
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