Speaker
Stefano Rusponi
(EPFL/IPHYS)
Description
Regular arrays of single atom magnets represent model systems for information storage at the ultimate length scales. Individual rare-earth atoms on decoupling layers have recently received great attention for showing extraordinary magnetic stability; however, they still lack spatial order. Here we report a self-assembled superlattice of individual and noninteracting Dy atoms on graphene grown on Ir(111), with magnetic hysteresis up to 5.6 T and spin lifetime of 1000 seconds at 2.5 K. The observed magnetic stability of Dy atoms is a consequence of the low intrinsic electron and phonon densities of graphene and the six-fold symmetry of the Dy adsorption site [R. Baltic et al., Nano Lett. (2016), DOI: 10.1021/acs.nanolett.6b03543].
Authors
Ms
Romana Baltic
(EPFL/IPHYS)
Dr
Marina Pivetta
(EPFL/IPHYS)
Dr
Fabio Donati
(EPFL/IPHYS)
Dr
Christian Wäckerlin
(EPFL/IPHYS)
Ms
Aparajita Singha
(EPFL/IPHYS)
Dr
Jan Dreiser
(PSI/SLS)
Stefano Rusponi
(EPFL/IPHYS)
Prof.
Harald Brune
(EPFL/IPHYS)
