This title appears in the Scientific Report :
2014
Please use the identifier:
http://hdl.handle.net/2128/24470 in citations.
Please use the identifier: http://dx.doi.org/10.1038/ncomms6558 in citations.
Quantum well states and amplified spin-dependent Friedel oscillations in thin films
Quantum well states and amplified spin-dependent Friedel oscillations in thin films
Electrons mediate many of the interactions between atoms in a solid. Their propagation in a material determines its thermal, electrical, optical, magnetic and transport properties. Therefore, the constant energy contours characterizing the electrons, in particular the Fermi surface, have a prime imp...
Saved in:
Personal Name(s): | Bouhassoune, Mohammed (Corresponding Author) |
---|---|
Zimmermann, Bernd / Mavropoulos, Phivos / Wortmann, Daniel / Dederichs, Peter H. / Blügel, Stefan / Lounis, Samir | |
Contributing Institute: |
Theoretische Nanoelektronik; PGI-2 Quanten-Theorie der Materialien; PGI-1 Quanten-Theorie der Materialien; IAS-1 |
Published in: | Nature Communications, 5 (2014) S. 5558 |
Imprint: |
London
Nature Publishing Group
2014
|
DOI: |
10.1038/ncomms6558 |
PubMed ID: |
25424343 |
Document Type: |
Journal Article |
Research Program: |
Exploratory materials and phenomena |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1038/ncomms6558 in citations.
Electrons mediate many of the interactions between atoms in a solid. Their propagation in a material determines its thermal, electrical, optical, magnetic and transport properties. Therefore, the constant energy contours characterizing the electrons, in particular the Fermi surface, have a prime impact on the behaviour of materials. If anisotropic, the contours induce strong directional dependence at the nanoscale in the Friedel oscillations surrounding impurities. Here we report on giant anisotropic charge density oscillations focused along specific directions with strong spin-filtering after scattering at an oxygen impurity embedded in the surface of a ferromagnetic thin film of Fe grown on W(001). Utilizing density functional theory, we demonstrate that by changing the thickness of the Fe films, we control quantum well states confined to two dimensions that manifest as multiple flat energy contours, impinging and tuning the strength of the induced charge oscillations which allow to detect the oxygen impurity at large distances (≈50 nm). |