Anomalously large g-factor of single atoms adsorbed on a metal substrate

Abstract

We have performed inelastic scanning tunneling spectroscopy (ISTS) on individual Fe atoms adsorbed on a Ag(111) surface. ISTS reveals a magnetization excitation with a lifetime of about 400 fsec which decreases linearly upon application of a magnetic field. Astoundingly, we find that the g-factor, which characterizes the shift in energy of the excitation in a magnetic field, is g = 3.1 instead of the regular value of 2. This enhancement can be understood when considering the complete electronic structure of both the Ag(111) surface state and the Fe atom, as shown by ab initio calculations of the magnetic susceptibility.

11 pages, 3 figures

References in corpus (6)

• Magnetic Anisotropy and Magnetization Dynamics of Individual Atoms and Clusters of Fe and Co on Pt(111)
• Spin Orbit Coupling and Spin Waves in Ultrathin Ferromagnets: The Spin Wave Rashba Effect
• Spin Inelastic Electron Tunneling Spectroscopy on Local Spin Adsorbed on Surface
• Dynamical magnetic excitations of nanostructures from first-principles
• Theory of Local Dynamical Magnetic Susceptibilities from the Korringa-Kohn-Rostoker Green Function Method
• Cotunneling theory of inelastic STM spin spectroscopy

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