2005/08/30 by J. Minar, J. Minář, H. Ebert +9 · 21 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Electron #Fano plane #Ferromagnetism #Heusler alloys: electronic and magnetic properties #Magnetic properties of thin films #Paramagnetism #Photoelectric effect #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spectral line #Spin polarization #Valence (chemistry) #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.95.166401
published in Physical Review Letters 95(16), 166401 (American Physical Society) · 11 pages, 3 figures accepted by PRL
arxiv created 2005/08/30 · openalex publication_date 2005/10/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The pure Fano effect in angle-integrated valence-band photoemission of ferromagnets has been observed for the first time. A contribution of the intrinsic spin polarization to the spin polarization of the photoelectrons has been avoided by an appropriate choice of the experimental parameters. The theoretical description of the resulting spectra reveals a complete analogy to the Fano effect observed before for paramagnetic transition metals. While the theoretical photocurrent and spin-difference spectra are found in good quantitative agreement with experiment in the case of Fe and Co, only a qualitative agreement could be achieved in the case of Ni by calculations on the basis of plain local spin-density approximation. Agreement with experimental data could be improved in this case in a very substantial way by a treatment of correlation effects on the basis of dynamical mean field theory.