A PhD position in Experimental Physics is available at Helmholtz-Zentrum
Berlin / BESSY II in collaboration with Technische Universität Berlin
(funded by Deutsche Forschungsgemeinschaft, DFG research unit FOR 1282)

STABILIZING HIGH-SPIN STATES OF TRANSITION METAL DOPED SILICON CLUSTERS

Our group performs fundamental research in magnetism on the atomic
scale. The central theme of this particular project is to tailor the
electronic structure of silicon clusters by transition-metal doping and
hydrogen passivation. The aim is to establish a general understanding of
the electronic properties in the exohedral and endohedral size ranges of
transition-metal doped silicon clusters, which seem to be characterized
by either localized or delocalized valence electrons of the impurity
atom, leading to distinct electronic, geometric, and magnetic properties
in both size regimes. This insight will be used to recover high-spin
states in the endohedral size regime by hydrogen passivation of the
silicon shell. This project will use state-of-the-art x-ray
spectroscopic techniques to investigate magnetic moments of
size-selected free clusters, molecules, and complexes. See

V. Zamudio-Bayer et al., Coordination-driven magnetic-to-nonmagnetic
transition in manganese-doped silicon clusters, Phys. Rev. B, 88, 115425
(2013), dx.doi.org/10.1103/PhysRevB.88.115425

M. Niemeyer et al., Spin Coupling and Orbital Angular Momentum Quenching
in Free Iron Clusters, Phys. Rev. Lett., 108, 057201 (2012)
dx.doi.org/10.1103/PhysRevLett.108.057201

for recent results.

We seek highly motivated applicants with a MSc degree in Physics or
Physical Chemistry, and with experience in at least one of the
following: x-ray spectroscopy, XMCD, electronic structure, magnetism,
cryogenic ion traps, radio-frequency ion guides, mass spectrometry,
metal and semiconductor clusters, or organometallic complexes. The
candidate will work in an international research team. He or she will
utilize our existing cluster beam/ion trap XMCD apparatus, contribute to
instrumental development for metal-silicon-hydride sample preparation,
carry out spectroscopic investigation, and perform data analysis.

Please contact Tobias Lau (tobias.lau@helmholtz-berlin.de) for further
information about the project and details on how to apply. The position
will remain open until filled.

--
Dr. Tobias Lau
Institut für Methoden und Instrumentierung der Forschung mit
Synchrotronstrahlung
Albert-Einstein-Straße 15
12489 Berlin
 

tobias.lau@helmholtz-berlin.de

Votes: 0
E-mail me when people leave their comments –

You need to be a member of The International NanoScience Community - Nanopaprika.eu to add comments!

Join The International NanoScience Community - Nanopaprika.eu