Berlin 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 58: Electronic Structure of Surfaces II
O 58.8: Vortrag
Mittwoch, 18. März 2015, 16:45–17:00, MA 041
Probing the magnetic properties of Cr atoms adsorbed on copper nitride — •Zsolt Majzik1, Roberto Robles2, Carmen Rubio-Verdú1, Martina Corso3,4, Nicolás Lorente2, and Nacho Pascual1,3 — 1CIC nanoGUNE, Donostia-San Sebastián, Spain — 2Catalan Institute of Nanoscience and Nanotechnology (ICN2), Barcelona, Spain — 3Ikerbasque, Basque Foundation for Science, Bilbao, Spain — 4Materials Physics Center, EHU, Donostia-San Sebastián, Spain
In the last decade it has been shown that magnetic properties of a single atom can be probed by inelastic electron tunneling spectroscopy. In addition, magnetic nanostructures have been routinely assembled via atomic manipulation. Spin excitation is induced if the bias voltage exceeds the threshold energy for excitation. This process allows inelastic tunneling that leads to a characteristic change in the conductance. Here we aimed to study the magnetic properties of isolated Cr atoms adsorbed on Cu2N/Cu(100) surface. Different inelastic tunneling spectra were observed over Cr atoms adsorbed on N sites than on Cu sites. In the first case we interpret our spectra as interplay between spin excitation and Kondo screening effect, which appears here at larger biases. However, if Cr atom adsorbs on the Cu site, the Kondo effect does not appear in the spectra, only a spin excitation has a contribution near the Fermi level. Our results suggest that the spin configuration of the Cr atom varies among different adsorption positions. We have performed DFT calculations to better understand the change in spin configuration as well as in the magnetic anisotropy.