DataVXThe Journal of Physical Chemistry LettersPaper
journal article·2020-09-03Open access

Key Role of the Surface Band Structure in Spin-Dependent Interfacial Electron Transfer: Ar/Fe(110) and Ar/Co(0001)

Moritz Müller, Pedro Miguel Echenique, Daniel Sánchez-Portal

The Journal of Physical Chemistry Letters· Volume 11· Issue 17
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Source abstract

Abstract

The injection of spin-polarized electrons across interfaces is central to many technologies, and hence, it is important to understand the main ingredients controlling it. Here, we demonstrate that the spin dependence of ultrafast electron transfer at Ar/Co(0001) and Ar/Fe(110) interfaces is rooted in the details of the spin-split surface band structures. The injection dynamics are particularly sensitive to the sizes (in reciprocal space) of projected electronic band gaps around Γ̅. Our ab initio calculations back that minority electrons are injected significantly faster than majority electrons in line with recently reported experimental injection times. A simple tunnelling model incorporating the spin-dependent gap sizes confirms that this ingredient is crucial to rationalize the experimental results.
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Research context

OpenAlex topics: Quantum and electron transport phenomena · Molecular Junctions and Nanostructures · Semiconductor materials and devices

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Donostia International Physics Center (DIPC), Paseo de Manuel Lardizabal 4, San Sebastián-Donostia 20018, Spain

Centro de Fı́sica de Materiales CFM-MPC (CSIC-UPV/EHU), Paseo de Manuel Lardizabal 5, San Sebastián-Donostia 20018, Spain

CIC nanoGUNE, Tolosa Hiribidea 76, San Sebastián-Donostia, 20018, Spain

Departamento de Fı́sica de Materiales, Facultad de Ciencias Quı́micas, Universidad del Paı́s Vasco (UPV-EHU), Apdo. 1072, San Sebastián-Donostia 20080, Spain

Funding

Ministerio de Ciencia e Innovaci??n · Euskal Herriko Unibertsitatea · European Commission

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