Spin polarization of the split Kondo state

Physical Review Letters
Kirsten von BergmannAndreas J Heinrich

Abstract

Spin-resolved scanning tunneling microscopy is employed to quantitatively determine the spin polarization of the magnetic field-split Kondo state. Tunneling conductance spectra of a Kondo-screened magnetic atom are evaluated within a simple model taking into account inelastic tunneling due to spin excitations and two Kondo peaks positioned symmetrically around the Fermi energy. We fit the spin state of the Kondo-screened atom with a spin Hamiltonian independent of the Kondo effect and account for Zeeman splitting of the Kondo peak in the magnetic field. We find that the width and the height of the Kondo peaks scales with the Zeeman energy. Our observations are consistent with full spin polarization of the Kondo peaks, i.e., a majority spin peak below the Fermi energy and a minority spin peak above.

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Citations

Dec 1, 2015·Nature Communications·A SpinelliA F Otte
Jan 12, 2017·Nature Communications·Matthias MuenksKlaus Kern
Jul 19, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Julen Ibañez-AzpirozSamir Lounis
Sep 8, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Manuel GruberRichard Berndt
Oct 12, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·N NéelJ Kröger
Jan 30, 2016·Physical Review Letters·Sujoy KaranRichard Berndt
Dec 15, 2018·Physical Review Letters·Jens KügelNicolás Lorente
May 10, 2020·Physical Review Letters·Markus TernesWolf-Dieter Schneider
Jul 22, 2017·Physical Review Letters·Julen Ibañez-AzpirozSamir Lounis
Jul 7, 2021·The Journal of Physical Chemistry Letters·Martin ŽondaMartin Švec
Sep 6, 2017·Nano Letters·Deung-Jang ChoiSebastian Loth
Oct 30, 2020·Nano Letters·Léo GarnierLaurent Limot

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