Itinerant Nature of Atom-Magnetization Excitation by Tunneling Electrons

Alexander Ako Khajetoorians; Samir Lounis; Bruno Chilian; Antonio T. Costa; Lihui Zhou; Douglas L. Mills; Jens Wiebe; Roland Wiesendanger

arXiv · 1010.1284

Itinerant Nature of Atom-Magnetization Excitation by Tunneling Electrons

Alexander Ako Khajetoorians·Samir Lounis·Bruno Chilian·Antonio T. Costa·Lihui Zhou·Douglas L. Mills·Jens Wiebe·Roland Wiesendanger

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Abstract

We have performed single-atom magnetization curve (SAMC) measurements and inelastic scanning tunneling spectroscopy (ISTS) on individual Fe atoms on a Cu(111) surface. The SAMCs show a broad distribution of magnetic moments with $\unit[3.5]{\mu_{\rm B}}$ being the mean value. ISTS reveals a magnetization excitation with a lifetime of $\unit[200]{fsec}$ which decreases by a factor of two upon application of a magnetic field of $\unit[12]{T}$. The experimental observations are quantitatively explained by the decay of the magnetization excitation into Stoner modes of the itinerant electron system as shown by newly developed theoretical modeling.

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Alexander Ako Khajetoorians, Samir Lounis, Bruno Chilian, Antonio T. Costa, Lihui Zhou, Douglas L. Mills, Jens Wiebe, Roland Wiesendanger. 2010-10-06. Itinerant Nature of Atom-Magnetization Excitation by Tunneling Electrons. https://arxiv.org/abs/1010.1284

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