Journal Article

FZJ-2020-04956

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A new view on the origin of zero-bias anomalies of Co atoms atop noble metal surfaces

Bouaziz, J. (Corresponding author)FZJ* ; Mendes Guimarães, F. S.FZJ* ; Lounis, S. (Corresponding author)FZJ*

2020
Nature Publishing Group UK [London]

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Please use a persistent id in citations: http://hdl.handle.net/2128/26380  doi:10.1038/s41467-020-19746-1

Abstract: Many-body phenomena are paramount in physics. In condensed matter, their hallmark is considerable on a wide range of material characteristics spanning electronic, magnetic, thermodynamic and transport properties. They potentially imprint non-trivial signatures in spectroscopic measurements, such as those assigned to Kondo, excitonic and polaronic features, whose emergence depends on the involved degrees of freedom. Here, we address systematically zero-bias anomalies detected by scanning tunneling spectroscopy on Co atoms deposited on Cu, Ag and Au(111) substrates, which remarkably are almost identical to those obtained from first-principles. These features originate from gaped spin-excitations induced by a finite magnetic anisotropy energy, in contrast to the usual widespread interpretation relating them to Kondo resonances. Resting on relativistic time-dependent density functional and many-body perturbation theories, we furthermore unveil a new many-body feature, the spinaron, resulting from the interaction of electrons and spin-excitations localizing electronic states in a well defined energy.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IAS-1)
2. Quanten-Theorie der Materialien (PGI-1)
3. JARA-FIT (JARA-FIT)
4. JARA - HPC (JARA-HPC)
5. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 142 - Controlling Spin-Based Phenomena (POF3-142) (POF3-142)
2. First-principles investigation of single magnetic nano-skyrmions (jias17_20190501) (jias17_20190501)

Appears in the scientific report 2020

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