TY  - JOUR
AU  - Azpiroz, Julen Ibanez
AU  - dos Santos Dias, Manuel
AU  - Blügel, Stefan
AU  - Lounis, Samir
TI  - Longitudinal and transverse spin relaxation times of magnetic single adatoms: An ab initio analysis
JO  - Physical review / B
VL  - 96
IS  - 14
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2017-06913
SP  - 144410
PY  - 2017
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000412434600005
DO  - DOI:10.1103/PhysRevB.96.144410
UR  - https://juser.fz-juelich.de/record/838270
ER  -