ELFT HÍRADÓ

[tcsaba AT eik.bme.hu]

                    M E G H Í V Ó - I N V I T A T I O N

     Seminar series of the Department of Theoretical Physics at the
           Budapest University of Technology and Economics

                               András Deák
          (Department of Theroetical Physics, Budapest University
                        of Technology and Economics)

           Magnetism of Gadolinium: A First-Principles Perspective


We use the relativistic disordered local moment theory combined with
the LSDA+U approach, implemented within the screened
Korringa--Kohn--Rostoker multiple scattering theory, to investigate
the effects of finite temperature on the electronic structure of the
bulk and the surface of gadolinium metal. The variation of calculated
spectral properties of the Fermi surface and the density of states in
the bulk and at the surface are in good agreement with recent
photoemission experiments performed in both ferromagnetic and
paramagnetic phases. In the paramagnetic phase we find vanishing spin
splitting of the conduction band, but finite local spin moments both
in bulk and at the surface. Together with the finite-temperature
behaviour of the local moment below the Curie temperature, our
findings suggest that the local moment of the conduction band does not
arise only due to polarization by the localized 4f states, but rather
there is a more complex interplay between localized and itinerant
states.


Idöpont: 2015. október 30., 10:15
Helyszín:
BME Fizikai Intézet, Elméleti Fizika Tanszék,
Budafoki út 8. F-épület, III lépcsöház, szemináriumi szoba


----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.