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Tuning Paramagnetic Spin Excitations of Single Adatoms

Julen Ibañez-Azpiroz, Manuel dos Santos Dias, Benedikt Schweflinghaus, Stefan Blügel, and Samir Lounis
Phys. Rev. Lett. 119, 017203 – Published 7 July 2017
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Abstract

We predict the existence of paramagnetic spin excitations (PSE) in nonmagnetic single adatoms. Our calculations demonstrate that PSE develop a well-defined structure in the meV region when the adatom’s Stoner criterion for magnetism is close to the critical point. We further reveal a subtle tunability and enhancement of PSE by external magnetic fields. Finally, we show how PSE can be detected as moving steps in the dI/dV signal of inelastic scanning tunneling spectroscopy, opening a potential route for experimentally accessing electronic properties of nonmagnetic adatoms, such as the Stoner parameter.

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  • Received 13 February 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.017203

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Julen Ibañez-Azpiroz*, Manuel dos Santos Dias, Benedikt Schweflinghaus, Stefan Blügel, and Samir Lounis

  • Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, D-52425 Jülich, Germany

  • *j.azpiroz@fz-juelich.de
  • s.lounis@fz-juelich.de

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Issue

Vol. 119, Iss. 1 — 7 July 2017

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