s-d hybridization and evolution of the electronic and magnetic properties in small Co and Ni clusters
Photoelectron spectra of cold Ni-n and Co-n clusters revealed discrete electronic features for n<10 for Ni and 20 for Co. These features, mainly due to detachment of 4s electrons, merge with 3d-derived features at larger cluster sizes, indicating the onset of significant s-d hybridization. The current results clearly revealed how the electronic structure of Ni and Co clusters evolves from molecular to bulklike in the early stage of cluster growth. They also provide insight into the origin of the enhanced magnetism in small Ni and Co clusters, due to the localized nature of the 3d electrons.
Physical Review B
- Pub Date:
- March 2002
- Spectroscopy and geometrical structure of clusters;
- Photoelectron spectra;
- Electronic structure of nanoscale materials: clusters nanoparticles nanotubes and nanocrystals