Berlin 2018 – scientific programme
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O: Fachverband Oberflächenphysik
O 98: Electronic structure: Surface magnetism and spin phenomena I
O 98.1: Talk
Thursday, March 15, 2018, 15:00–15:15, MA 042
Long spin relaxation time in a transition metal atom in contact to a metal substrate — Jan Hermenau1, Markus Ternes2, •Manuel Steinbrecher1, Jens Wiebe1, and Roland Wiesendanger1 — 1Department of Physics, Hamburg University, 20355 Hamburg, Germany — 2Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany
Long spin-energy relaxation times are a prerequisite for the use of spins in data storage or nanospintronics technologies. An atomic-scale solid-state realization of such a system is the spin of a transition metal atom adsorbed on a suitable substrate. For the case of a metallic substrate, which enables a direct contacting of the spin by conduction electrons, the lifetimes reported to date are extremely short and on the order of only hundreds of femtoseconds [1,2]. Here, we show that the spin states of iron atoms adsorbed directly on a conductive platinum substrate have an astonishingly long spin-energy relaxation time in the nanosecond regime, which is comparable to that of a transition metal atom which is decoupled from the substrate electrons by a thin decoupling layer [4]. The combination of long spin-energy relaxation times and strong coupling to conduction electrons implies the possibility to use flexible coupling schemes in order to process the spin-information.
[1] A. A. Khajetoorians et al., PRL 111, 157204 (2013)
T. Schuh et al., J. Appl. Phys. 107, 09E156 (2010)
W. Paul et al., Nat. Phys. 13, 403 (2017)