Journal Article

FZJ-2017-06913

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Longitudinal and transverse spin relaxation times of magnetic single adatoms: An ab initio analysis

Azpiroz, J. I.FZJ* ; dos Santos Dias, M.FZJ* ; Blügel, S.FZJ* ; Lounis, S.FZJ*

2017
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/15577  doi:10.1103/PhysRevB.96.144410

Abstract: 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.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IAS-1)
2. Quanten-Theorie der Materialien (PGI-1)
3. JARA-FIT (JARA-FIT)
4. JARA - HPC (JARA-HPC)

Research Program(s):

1. 142 - Controlling Spin-Based Phenomena (POF3-142) (POF3-142)
2. 143 - Controlling Configuration-Based Phenomena (POF3-143) (POF3-143)
3. Calculation of quantum spin-fluctuations in nano-magnets (jias19_20161101) (jias19_20161101)

Appears in the scientific report 2017

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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