Molecular Metals and Magnetic Nanostructures

Molekulare Metalle und magnetische Nanostrukturen

Prof. Dr. Jens Müller

 


Bachelor- and Master-Projects /
Bachelor- und Masterarbeiten

In order to learn about the currently available Bachelor and Master projects and the investigated physical problems, please contact Prof. J. Müller by Email or stop by the office  _ _.326 (ground floor).

In unserer Arbeitsgruppe werden regelmäßig Projekte für Bachelor- und Master-Arbeiten aus der aktuellen Forschung in experimenteller Festkörperphysik angeboten. Eine Übersicht möglicher Projekte in unserer Arbeitsgruppe finden Sie hier. Für weitere Informationen hierzu kontaktieren Sie bitte den Arbeitsgruppenleiter, Prof. J. Müller, per Email, oder schauen Sie einfach vorbei (Erdgeschoss, Raum _ _.326, gleicher Gang wie Prüfungsamt und Dekanat).

Our Profile / Unser Profil

Our research group is concerned with the dynamical properties of charge carriers in low-dimensional molecular metals and other correlated-electron systems. By means of time-resolved transport measurements we obtain spectroscopic information on the electronic processes in the vicinity of metal-insulator transitions as well as unusual electronic, magnetic and superconducting phases.
A second emphasis is on the investigation of magnetic micro- and nanostructures. Using micro- and nanofabricated Hall sensors based on semiconductor heterostructures allows for detecting the stray field of only few or even single magnetic particles. We are interested, e.g., in the dynamics of domain wall motion as well as the fundamental mechanisms of magnetization reversal.

More details about our research areas can be found in our research profile.


Unsere Arbeitsgruppe beschäftigt sich mit den dynamischen Eigenschaften der Ladungsträger in niedrigdimensionalen molekularen Metallen und anderen korrelierten Elektronensystemen. Mittels zeitaufgelöster Transportmessungen erhalten wir spektroskopische Informationen über die elektronischen Prozesse in der Nähe von Metall-Isolator-Übergängen sowie in ungewöhnlichen elektronischen, magnetischen und supraleitenden Phasen.
Ein zweiter Schwerpunkt bildet die Untersuchung magnetischer Mikro- und Nanostrukturen. Die Verwendung von mikro- und nanostrukturierten Hall-Sensoren basierend auf Halbleiter-Heterostrukturen erlaubt die Messung des Streufeldes von einigen wenigen bzw. einzelnen magnetischen Teilchen. Wir interessieren uns z.B. für die Dynamik der Bewegung von Domänenwänden sowie für die grundlegenden Mechanismen der Magnetisierungsumkehr.

Weitere Details zu unseren Forschungsthemen finden sich in unserem Forschungsprofil.

News

2021

Our group enjoys an adventourus day in the "Kletterwald Taunus" as a great outdoor group activity. Some impressions can be found here.


The research project Influence of Spin and Charge Fluctuations on Magnetic-Field-Induced Metal-Insulator Transitions funded by the DFG starts in May 2021, jointly with PD Dr. Steffen Wirth, MPI-CPfS, Dresden.


Laura Hechler joins our group as a new Ba student (April 2021). Welcome!


2020

Despite Covid-19, doctoral graduations continue in our group. We congratulate our colleague Dr. Mohanad Al-Mamoori to his successful doctoral defense (17th November 2020), see a picture here. The title of his PhD thesis is 3D Nanomagnetic Architectures Investigated by micro-Hall Sensors. The thesis was jointly supervised with Prof. Lambert Alff from the Institute for Materials Science at TU Darmstadt. We wish Mohanad all the best for his starting career!


M.Sc. Tim Thyzel (former group member) joins our group as a PhD student (November 2020). Welcome!

Welcome also to Shehryar Jehanzeb Bokhari who has joined the group as Ba student (October2020). 


The article Formation of nanoscale polarized clusters as precursors of electronic ferroelectricity probed is published as Rapid Communication in Phys. Rev. B (open access) (September 2020).


M.Sc. Marvin Kopp (former group member) joins our group as a PhD student (July 2020). Welcome!


The collaborative research with M.Sc.E. Piros and Prof. L. Alff from TU Darmstadt on the Role of Oxygen defects in forming conductive filaments in Yb2O3-based analog RRAM devices is published in Phys. Rev. Applied and selected as Editor's Suggestion (September 2020). 


Start of the Collaborative Research Center SFB-TRR 288 "Elastic Tuning and Response of Electronic Quantum Phases of Matter" (July 2020). The center is funded by the DFG for four years and involves the Goethe-University Frankfurt, Gutenberg-University Mainz, Karlsruhe Institute of Technology, and the Max-Plack-Institutes for Polymer Research (Mainz) and Chemical Physics of Solids (Dresden). 


The DPG Spring Meeting in Dresden and many other Conferences, Symposia and Workshops had to be canceled due to the current worldwide situation regarding SARS-CoV-2 (corona) virus (March 2020 - ?).


Evaluation of the Collaborative Research Center initiative "Elastic Tuning and Response of Electronic Quantum Phases of Matter" (Frankfurt, Mainz, Karlsruhe and Dresden) by the DFG (January 2020).


2019

Our group concludes an exciting and successful year 2019 with a Billiards tournament and dinner with "Äppelwoi" in Frankfurt (December 2019).


Prof. Kenichiro Hashimoto from the University of Tokyo visits our lab for three weeks to intensify our collaboration on the charge-glass state in a low-dimensional correlated electron system (November/December 2019).


M.Sc. Mohanad Al Mamoori gives a talk on "3D Magnetic Nanostructures studied by micro-Hall magnetometry" at the Conference on Magnetism and Magnetic Materials in Las Vegas, USA (November 2019).


M.Sc. Tatjana Thomas wins the best-poster award for her work on "Fluctuation spectroscopy on the charge-glass state of quasi-twodimensional organic conductors" at the International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM) in Tomar, Portugal (September 2019). 


A collaborative neutron study Lattice dynamics coupled to charge and spin degrees of freedom in the molecular dimer-Mott insulator κ-(BEDT-TTF)2Cu[N(CN)2]Cl is published in Phys. Rev. Lett. (July 2019).


M.Sc. Merlin Mitschek and Jens Müller deliver talks at the International Conference on Noise and Fluctuations (ICNF 2019) in Neuchatel, Switzerland (June 2019).


Zum offiziellen Abschluss des SFB-TRR49 "Condensed Matter systems with Variable many-Body Interactions" erscheint der Artikel Tatjana Thomas et al., Low-frequency charge-carrier dynamics in ferroelectric κ-(BEDT-TTF)2X - A Comparative Study of X = Cu[N(CN)2]Cl and X = Hg(SCN)2Cl in Phys. Status Solidi B (April 2019). 


Sonderforschungsbereich TRR 288

Kontakt

Prof. Dr. Jens Müller

Physikalisches Institut
Physik, Campus Riedberg
Raum _ _.326
Max-von-Laue-Straße 1
60438 Frankfurt am Main
T  +49 69 798 47274
F  +49 69 798 47277
Jens Müller

 

Administration

Birgit Scherff

Physikalisches Institut
Physik, Campus Riedberg
Raum _ 0.321
Max-von-Laue-Straße 1
60438 Frankfurt am Main
T  +49 69 798 47242
F  +49 69 798 47250
Birgit Scherff