%0 Journal Article
%A Azpiroz, Julen Ibanez
%A dos Santos Dias, Manuel
%A Blügel, Stefan
%A Lounis, Samir
%T Longitudinal and transverse spin relaxation times of magnetic single adatoms: An ab initio analysis
%J Physical review / B
%V 96
%N 14
%@ 2469-9950
%C Woodbury, NY
%I Inst.
%M FZJ-2017-06913
%P 144410
%D 2017
%X We present a systematic ab initio investigation of the longitudinal and transverse spin relaxation times of magnetic single adatoms deposited on metallic substrates. Our analysis based on time-dependent density functional theory shows that the longitudinal time T∥ is of order femtosecond while the transverse time T⊥ is of order picosecond, i.e. T⊥≫T∥. This comes as a consequence of the different energy scales of the corresponding processes: T∥ involves spin-density excitations of order eV, while T⊥ is governed by atomic spin excitations of order meV. Comparison to available inelastic scanning tunneling spectroscopy dI/dV experimental curves shows that the order of magnitude of T⊥ agrees well with our results. Regarding T∥, the time scale calculated here is several orders of magnitude faster than what has been measured up to now; we therefore propose that an ultrafast laser pulse measuring technique is required in order to access the ultrafast spin dynamics described in this paper.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000412434600005
%R 10.1103/PhysRevB.96.144410
%U https://juser.fz-juelich.de/record/838270