2018 Impact factor 2.612

EPJ B – Au and Cu as building blocks of high-density memory devices

Gold and copper atoms adsorbed on a NaCl surface behave as isolated atoms and complex electronic interactions with the surface are negligible. A study by a group of Brazilian researchers uses first-principles simulations to measure the electronic and magnetic properties of gold and copper atoms adsorbed on NaCl(001) surfaces, as well as the modifications in these properties upon charge injection.

The results presented in EPJ B show that neutral Au and Cu adatoms on NaCl(001) interact weakly with the ionic substrate. Magnetization values are close to those of the corresponding isolated atoms, with spatial distributions concentrated mainly around the adatoms. The magnetization comes from the unfilled s valence orbital of the adatoms, and its value drops to zero when a single electron is injected in the adatom and fills its s shell.

Quantifying and manipulating the magnetic moments of the adsorbed atoms is essential to exploit the these systems for producing ultra-high density magnetic memory devices. Experimentalists have already shown the feasibility of manipulating the adatom charge and magnetization with an STM tip.

To read the full paper “Au and Cu Atoms on NaCl(001): a single-atom based memory device prototype?” by A.S. Martins et al., Eur. Phys. J. B 78, 543–546 (2010) click here.

Paolo Biscari
The typing and the arrangement of tables and figures are perfect. Also, corrections to English and bibliography were appropriate. All together there is no correction to be made and I thank you for the excellent work. I would also thank you for the kind promptness in delivering the proofs.

Maurizio Consoli, Istituto Nazionale di Fisica Nucleare - Sezione di Catania, Italy

ISSN: 2190-5444 (Electronic Edition)

© Società Italiana di Fisica and