Experimentelle Physik II

Lehrstuhlinhaber

Prof. Dr. Matthias Bode

Zimmer: F-161
Tel.: +49 931 31-83218
E-Mail: matthias.bode@uni-wuerzburg.de
Researcher ID: S-3249-2016
Sprechzeiten: kurzfristig nach Vereinbarung
(bitte E-Mail-Anfrage senden)

Sekretariat

Frau Eaton / Frau Riegel
Zimmer: F-162
Tel.: +49 931 31-85756
Fax: +49 931 31-85158
E-Mail: ep2-sekretariat@uni-wuerzburg.de

Auf dem Gebiet der Rastertunnelmikroskopie bei tiefen Temperaturen sind am Lehrstuhl EP2 mehrere Masterarbeiten zu vergeben. Eine hochwertige und moderne experimentelle Ausstattung ist vorhanden! Bei der Durchführung der Projekte werden Sie mit einem kleinen Team zusammenarbeiten. Hier eine kurze Themenliste:

Switching spin spirals by stoichiometry
Charge transport across magnetic nanostructures on the atomic scale
Investigation of localized states in magnetic adatoms on Nb(110)
Growth and characterization of topological insulator thin films on Nb(110)
Influence of magnetic and non-magnetic adatoms on the 1D edge states of Pb_1-xSn_xSe

Mehr informationen zu den einzelnen Themen gibt es hier. Bei Interesse melden Sie sich bitte bei Prof. Matthias Bode (Stand 25.01.2023).

Science news

Evidence for spinarons in Co adatoms

Single cobalt (Co) atoms on the (111) surfaces of noble metals are considered to be prototypical systems for the Kondo effect in scanning tunnelling microscopy experiments. Yet, recent first-principles calculations performed by our collaborators at Forschungszentrum Jülich and the University of Duisburg-Essen suggest that the experimentally observed spectroscopic anomaly characteristic for Co atoms can be interpreted in terms of excitations of the spin of the Co atom and the formation of a novel many-body state, namely, the spinaron, rather than from a Kondo resonance.

The spinaron is a magnetic polaron that results from the interaction of spin excitations with conduction electrons. The experiments performed by Felix Friedrich and Dr. Artem Odobesko provide the first evidence for spinaronic states in Co atoms on the Cu(111) surface. Spin-polarized scanning tunnelling spectroscopy measurements in high magnetic fields allow us to discriminate between the different existing theoretical models and to invalidate the prevailing Kondo interpretation. Extended ab initio calculations instead suggest the presence of multiple spinaronic states.

The results have been published in Nature Phys.

Upcoming Colloquia & Seminars

Dec 07

Würzburg ToCoTronics Colloquium
"Optics meets STM: exploring ultrafast dynamics and light-matter interaction at atomic scales"
Melanie Müller - Fritz-Haber-Institut, Berlin

Dec 14

Würzburg ToCoTronics Colloquium
"Experimental Insights into Spintronics and Spincaloritronics in Compensated Magnetic Materials"
Helena Reichlova - Institute of Physics of the Czech Academy of Sciences

Jan 18

Würzburg ToCoTronics Colloquium
"TBA"
Michaela Lammel - Universität Konstanz

Feb 01

Würzburg ToCoTronics Colloquium
"Sandwiches and Mille-Feuilles involving 2D quantum spin liquids: transport and correlation effects""
Elio König - Max Planck Institut für Festkörperforschung, Stuttgart

Excellent PhD defense of Felix Friedrich

On June 16, Felix Friedrich not only successfully defended his PhD thesis on "Magnetic Excitations in Single and Coupled Atoms on Surfaces", his thesis was also awarded the top score of summa cum laude. We would like to congratulation Dr. Friedrich for this outstanding success and wish him all the best for his future life and career!

Funding

We are happy to announce that the third funding period of our SFB 1170 “Topological and Correlated Electronics at Surfaces and Interfaces” (ToCoTronics) has been approved by DFG! Our research group is contributing by two projects to this collaborative research effort:

In project A02 we will investigate spin-resolved transport properties of clean and doped topological materials. We will utilize the spin-polarized molecular nanoprobe (SP-MONA), a novel technique which allows for investigations at single-nm length scales and with single-impurity sensitivity.

Project C02 is aimed towards ultra-high resolution surface studies of topological superconductors. Towards this goal we will engineer and scrutinize the properties of (i) two-dimensional thin film hybrid systems, (ii) one-dimensional adatom chains, and (iii) lattices of impurities, which are viable platforms to realize topological superconductors which potentially host Majorana modes.