%0 Journal Article
%A Loukakos, P. A.
%A Lisowski, M.
%A Bihlmayer, G.
%A Blügel, S.
%A Wolf, M.
%A Bovensiepen, U.
%T Dynamics of the Self-Energy of the Gd(0001) Surface State Probed by Femtosecond Photoemission Spectroscopy
%J Physical review letters
%V 98
%@ 0031-9007
%C College Park, Md.
%I APS
%M PreJuSER-56613
%P 097401
%D 2007
%Z Record converted from VDB: 12.11.2012
%X Transient changes of the complex self-energy of the 5d(z)(2) surface state on Gd(0001) after intense optical excitation are investigated by femtosecond time-resolved photoemission. We observe an ultrafast (< 100 fs) broadening of the linewidth due to e-e scattering followed by a decrease of the binding energy due to thermal expansion of the lattice. In addition, we resolve a periodic breathing of the band structure which originates from a coherent phonon. An amplitude of 1 pm is derived from the binding energy shift upon lattice displacement calculated by density functional theory.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000244592100055
%R 10.1103/PhysRevLett.98.097401
%U https://juser.fz-juelich.de/record/56613