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  Monitoring surface resonances on Co2MnSi(100) by spin-resolved photoelectron spectroscopy

Braun, J., Jourdan, M., Kronenberg, A., Chadov, S., Balke, B., Kolbe, M., et al. (2015). Monitoring surface resonances on Co2MnSi(100) by spin-resolved photoelectron spectroscopy. Physical Review B, 91(19): 195128, pp. 1-8. doi:10.1103/PhysRevB.91.195128.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-9D03-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-0020-A
Genre: Journal Article

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 Creators:
Braun, J.1, Author
Jourdan, M.1, Author
Kronenberg, A.1, Author
Chadov, S.2, Author              
Balke, B.1, Author
Kolbe, M.1, Author
Gloskovskii, A.1, Author
Elmers, H. J.1, Author
Schönhense, G.1, Author
Felser, C.3, Author              
Klaeui, M.1, Author
Ebert, H.1, Author
Minar, J.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Stanislav Chadov, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863440              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: The magnitude of the spin polarization at the Fermi level of ferromagnetic materials at room temperature is a key property for spintronics. Investigating the Heusler compound Co2MnSi, a value of 93% for the spin polarization has been observed at room temperature, where the high spin polarization is related to a stable surface resonance in the majority band extending deep into the bulk. In particular, we identified in our spectroscopical analysis that this surface resonance is embedded in the bulk continuum with a strong coupling to the majority bulk states. The resonance behaves very bulklike, as it extends over the first six atomic layers of the corresponding (001) surface. Our study includes experimental investigations, where the bulk electronic structure as well as surface-related features have been investigated using spin-resolved photoelectron spectroscopy (SR-UPS) and for a larger probing depth spin-integrated high energy x-ray photoemission spectroscopy (HAXPES). The results are interpreted in comparison with first-principles band structure and photoemission calculations which consider all relativistic, surface, and high-energy effects properly.

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Language(s): eng - English
 Dates: 2015-05-182015-05-18
 Publication Status: Published in print
 Pages: -
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 91 (19) Sequence Number: 195128 Start / End Page: 1 - 8 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008