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Surface Reactivity Enhancement on a Pd/Bi2Te3 Heterostructure through Robust Topological Surface States
- Source :
- Scientific Reports
- Publication Year :
- 2013
- Publisher :
- Springer Science and Business Media LLC, 2013.
-
Abstract
- We present a study of the surface reactivity of a Pd/Bi2Te3 thin film heterostructure. The topological surface states from Bi2Te3, being delocalized and robust owing to their topological natures, were found to act as an effective electron bath that significantly enhances the surface reactivity of palladium in the presence of two oxidizing agents, oxygen and tellurium respectively, which is consistent with a theoretical calculation. The surface reactivity of the adsorbed tellurium on this heterostructure is also intensified possibly benefitted from the effective transfer of the bath electrons. A partially inserted iron ferromagnetic layer at the interface of this heterostructure was found to play two competing roles arising from the higher-lying d-band center of the Pd/Fe bilayer and the interaction between the ferromagnetism and the surface spin texture of Bi2Te3 on the surface reactivity and their characteristics also demonstrate that the electron bath effect is long-lasting against accumulated thickness of adsorbates.
- Subjects :
- Multidisciplinary
Materials science
Surface Properties
Bilayer
chemistry.chemical_element
Heterojunction
Topology
Article
Condensed Matter::Materials Science
Delocalized electron
Ferromagnetism
chemistry
Materials Testing
Nanoparticles
Adsorption
Texture (crystalline)
Tellurium
Physics::Chemical Physics
Thin film
Bismuth
Palladium
Surface states
Subjects
Details
- ISSN :
- 20452322
- Volume :
- 3
- Database :
- OpenAIRE
- Journal :
- Scientific Reports
- Accession number :
- edsair.doi.dedup.....aa83e257c2e8f5a5194db83de53bfab5