Abstract
Spins of single atoms adsorbed on substrates are promising building blocks for spintronics and quantum computation schemes. To process spin information and for increased magnetic stability, these spins have to be coupled to arrays. For a single atom, a high symmetry of the environment increases its spin stability. However, little is known about the role of the symmetry of the magnetic couplings in the arrays. Here, we study arrays of atomic spins coupled via Ruderman−Kittel−Kasuya−Yosida interaction, focusing on Dzyaloshinskii−Moriya and symmetric anisotropic exchange. We show that the high spin stability of a trimer can be remotely detected by a nearby atom, and how the Dzyaloshinskii−Moriya interaction leads to its destabilization. Adding more nearby atoms further destabilizes the trimer, due to a non-local effective transverse anisotropy originating in the symmetric anisotropic exchange. This transverse anisotropy can be quenched for highly symmetric structures, where the spin lifetime of the array increases drastically.
Highlights
Spins of single atoms adsorbed on substrates are promising building blocks for spintronics and quantum computation schemes
The breaking of inversion symmetry is responsible for the presence of the Dzyaloshinskii−Moriya (DM) interaction between the spins in materials with large spin−orbit interaction[4,5], which promotes the formation of magnetic skyrmions[6,7,8,9]
In conclusion, we revealed the dynamic behavior of RKKYcoupled complexes of two and more constituents
Summary
Spins of single atoms adsorbed on substrates are promising building blocks for spintronics and quantum computation schemes. It has recently been shown that, when the crystal field of a single absorbed atomic spin has high symmetry[11], and the spin is decoupled from the conduction electrons of the substrate, the spin state lifetime can be enormously enhanced, up to hours[12]. This brings the use of such atomic spins as bits of information technology into reach. The results of time-resolved spin-polarized scanning tunneling microscopy experiments are analyzed and interpreted taking into account the outcome of density functional theory (DFT) calculations and dynamic simulations
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
