Long-range electronic interactions between adatoms on transition metal surfaces
V. S. Stepanyuk (1), L. Niebergall (1), A. N. Baranov (2), W. Hergert, (2), P. Bruno (1) ((1) Max-Planck-Institut fuer Mikrostrukturphysik, Halle,, Germany; (2) Martin-Luther University of Halle - Department of Physics,, Halle, Germany)
TL;DR
This paper uses ab initio calculations to analyze how surface-state mediated electronic interactions between Cu adatoms vary on different transition metal surfaces, highlighting the role of spin polarization and surface states.
Contribution
It provides new insights into the spin-polarized surface states and their influence on long-range adatom interactions on Co/Cu(111) and Co(0001) surfaces, comparing with Cu(111).
Findings
Surface states of Co/Cu(111) and Co(0001) are spin-polarized.
Long-range interactions are mainly determined by sp-majority states.
Adatom interactions on Co(0001) are strongly suppressed at large distances.
Abstract
Ab initio calculations of surface-state mediated interactions between Cu adatoms on transition metal surfaces are presented. We concentrate on Co/Cu(111) and Co(0001) substrates and compare results with our calculations for Cu(111). Our studies show that surface states of Co/Cu(111) and Co(0001) are spin-polarized. We reveal that long-range interactions between adatoms are mainly determined by sp-majority states. In contrast to Cu(111) and Co/Cu(111), the interaction between adatoms on Co(0001) is strongly suppressed at large adsorbate separations.
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Taxonomy
TopicsSurface and Thin Film Phenomena · Quantum and electron transport phenomena · Advanced Chemical Physics Studies