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    • Technical Physics
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    • X-ray microscopy
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    • Theoretical Physics II
    • Theoretical Physics III
    • Theoretical Physics IV
    • Astronomy
    • Research Groups
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    • Prof. Dr. Matthias Bode
    • Prof. Dr. Hamad Albrithen
    • Dr. Artem Odobesko
    • Dr. Jing Qi
    • Dr. Markus Leisegang
    • Andreas Christ
    • Patrick Härtl
    • Florian Keller
    • Daryoush Nosraty Alamdary
    • Wun-Chang Pan
    • Manuel Seitz
    • Yu Wang
    • Paula Weber
    • Former group members
  • Teaching
  • Publications
    • since 2020
    • 2015-2019
    • 2010-2014
    • 2005-2009
    • 2000-2004
    • pre 2000
  • Instrumentation
    • LT-1
    • LT-2
    • LT-3
    • CryoMag
    • 1K
    • VT-STM/AFM
  • Media
    • 2021
    • 2020
    • 2019
    • 2018
    • 2017
    • 2016
    • 2015
    • 2014
    • pre 2014
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Experimentelle Physik II

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


Themen für Masterarbeiten

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 Pb1-xSnxSe

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

Reversible switching between spiral and collinear magnetic order via oxidation and reduction

Image of the reversible transition

The every-day ferromagnets we use magnetically order due to the exchange interaction, i.e., the overlap of electronic wave functions of neighboring atoms.  It causes the spins to order parallel, and the superposition of their magnetic moments produces the magnetic field we hold characteristic for feroomagnets.  Another, more complicated coupling is caused by the so-called Dzyaloshinskii-Moriya interaction. It causes the emergence of a wide variety of interesting magnetic structures, such as spin spirals and skyrmions. In a recent study, we showed by spin-polarized scanning tunneling microscopy that the interchain coupling between manganese oxide chains on Ir(001) can reproducibly be switched from chiral to collinear antiferromagnetic by increasing the oxidation state of MnO2, while the reverse process can be induced by thermal reduction. The underlying structure–property relationship has been revealed by low-energy electron diffraction intensity analysis performed by collaborators at FAU Erlangen-Nürnberg. Density functional theory calculations suggest that the magnetic transition may be caused by a significant increase of the Heisenberg exchange which overrides the Dzyaloshinskii-Moriya interaction upon oxidation.  The results have been published in Phys. Rev. B 107, L060409 (2023).

Upcoming Colloquia & Seminars

Nov 02

Würzburg ToCoTronics Colloquium
TBA
Yana Vaynzof - IFW Dresden

Nov 09

Würzburg ToCoTronics Colloquium
Time Evolution of Local Information
Claudia Artiaco - KTH Stockholm

Dec 14

Würzburg ToCoTronics Colloquium
TBA
Helena Reichlova - Institute of Physics of the Czech Academy of Sciences


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

SFB logo

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. We will apply SP-MONA to investigate (i) the spin-momentum locking for Dirac electrons in topological insulators, such as Bi2Se3. Furthermore, (ii) we will study how the propagation of charge carriers is affected by single defects or deliberately deposited adatoms. Finally, (iii) we plan to design of engineered adatom assemblies for improved quantum transport functionalities.

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.

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Lehrstuhl für Experimentelle Physik II
Am Hubland
97074 Würzburg

Phone: +49 931 31-85756
Fax: +49 931 31-85158
Email

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24.09.2023
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