DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2013 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DF: Fachverband Dielektrische Festkörper

DF 12: Poster 1

DF 12.70: Poster

Dienstag, 12. März 2013, 10:30–13:30, Poster D

Coordination-driven magnetic-to-nonmagnetic transition in manganese doped silicon clusters — •Linn Leppert1, Vicente Zamudio-Bayer2,3, Konstantin Hirsch2,3, Andreas Langenberg2,3, Jochen Rittmann2,3, Martin Kossick2,3, Robert Richter3, Akira Terasaki4, Thomas Möller3, Stephan Kümmel1, Bernd von Issendorff5, and J. Tobias Lau21Theoretische Physik IV, Universität Bayreuth, 95440 Bayreuth, GER — 2Institut für Methoden und Instrumentierung der Synchrotronstrahlung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, GER — 3Institut für Optik und Atomare Physik, Technische Universität Berlin, 10623 Berlin, GER — 4Cluster Research Laboratory, Toyota Technological Institute, 717-86 Futamata, Ichikawa, Chiba 272-0001, JP — 5Fakultät für Physik, Universität Freiburg, 79104 Freiburg, GER

X-ray Magnetic Circular Dichroism (XMCD) spectroscopy allows to obtain fundamental insight into magnetic properties of free, size-selected clusters. We demonstrate using a combination of XMCD and non-empirical density functional theory that the magnetic moment of small Si clusters doped with a single Mn impurity is completely quenched as soon as a cluster size of 10 Si atoms is exceeded. This is a result of an abrupt increase of the impurity coordination from 10 to 11 Si atoms. Since the impurity coordination in small exohedrally doped Si clusters is close to that observed in bulk Si, smaller clusters are, contrary to intuition, far better suited for prediciting the magnetic properties of the bulk system than larger endohedrally doped clusters.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2013 > Regensburg