Engineering Physics

Prof. Rudolf Gross

Research Field

The research activities of the Walther-Meißner-Institute are focused on low temperature solid-state and condensed matter physics. The research program is devoted to both fundamental and applied research and also addresses materials science, thin film and nanotechnology aspects. With respect to basic research the main focus of the WMI is on

  • superconductivity and superfluidity,
  • magnetism, spin transport, and spin caloritronics,
  • quantum phenomena in mesoscopic systems and nanostructures,
  • and the general properties of metallic systems at low and very low temperatures.

The WMI also conducts applied research in the fields of

  • solid-state quantum information processing systems,
  • superconducting and spintronic devices,
  • oxide electronics,
  • multi-functional and multiferroic materials,
  • and the development of low and ultra low temperature systems and techniques.

With respect to materials science, thin film and nanotechnology the research program is focused on

  • the synthesis of superconducting and magnetic materials,,
  • the single crystal growth of oxide materials,
  • the thin film technology of complex oxide heterostructures including multi-functional and multiferroic material systems,
  • the fabrication of superconducting, magnetic, and hybrid nanostructures,
  • and the growth of self-organized molecular ad-layers.

The WMI also develops and operates systems and techniques for low and ultra-low temperature experiments. A recent development are dry mK-systems that can be operated without liquid helium by using a pulse-tube refrigerator for precooling. Meanwhile, these systems have been successfully commercialized by the company VeriCold Technologies GmbH at Ismaning, Germany, which meanwhile has been acquired by Oxford Instruments. As further typical examples we mention a nuclear demagnetization cryostat for temperature down to below 100µK, or very flexible dilution refrigerator inserts for temperatures down to about 20mK fitting into a 2inch bore. These systems have been engineered and fabricated at the WMI. Within the last years, several dilution refrigerators have been provided to other research groups for various low temperature experiments. The WMI also operates a helium liquifier with a capacity of more than 150.000 liters per year and supplies both Munich universities with liquid helium. To optimize the transfer of liquid helium into transport containers the WMI has developed a pumping system for liquid helium that is commercialized in collaboration with a company.

Address/Contact

Walther-Meißner-Straße 8
85748 Garching b. München
+49 89 289 14202
Fax: +49 89 289 14206

Members of the Research Group

Professors

Staff

Teaching

Course with Participations of Group Members

Titel und Modulzuordnung
ArtSWSDozent(en)Termine
Magnetism
Zuordnung zu Modulen:
VU 3 Althammer, M. Dienstag, 13:30–15:00
sowie Termine in Gruppen
Mathematische Methoden der Physik 1
Zuordnung zu Modulen:
VU 5 Einzel, D. Montag, 14:00–16:00
sowie Termine in Gruppen
Physik der kondensierten Materie 1
Zuordnung zu Modulen:
VU 6 Gross, R.
Mitwirkende: Geprägs, S.
Dienstag, 12:00–14:00
Donnerstag, 10:00–12:00
sowie Termine in Gruppen
Supraleitung und Tieftemperaturphysik 1
Zuordnung zu Modulen:
VU 4 Gross, R. Hübl, H. Donnerstag, 12:00–14:00
sowie Termine in Gruppen
Fortschritte in der Festkörperphysik
Zuordnung zu Modulen:
PS 2 Gross, R. Dienstag, 10:15–11:30
Spin Caloritronics and Spin Pumping
Zuordnung zu Modulen:
PS 2 Althammer, M. Geprägs, S. Hübl, H. Weiler, M. Donnerstag, 14:00–15:30
Supraleitende Quantenschaltkreise
Zuordnung zu Modulen:
PS 2 Deppe, F. Fedorov, K. Gross, R. Marx, A. Dienstag, 14:30–16:00
Festkörperkolloquium
Zuordnung zu Modulen:
KO 2 Gross, R. Donnerstag, 17:00–19:00
FOPRA-Versuch 16: Josephson-Effekte in Supraleitern
Zuordnung zu Modulen:
PR 1 Gross, R.
Mitwirkende: Fischer, M.Ganzhorn, K.
Topical Issues in Magneto- and Spin Electronics
Zuordnung zu Modulen:
SE 2 Althammer, M. Brandt, M. Geprägs, S. Hübl, H. Weiler, M. Mittwoch, 11:30–13:00
Walther-Meißner-Seminar über aktuelle Fragestellungen der Tieftemperatur-Festkörperphysik
Zuordnung zu Modulen:
SE 2 Gross, R. Freitag, 13:30–14:45

Offers for Theses in the Group

Engineering Magnetization Dynamics in a Magnetic Insulator

In magnetic resonance, a high frequency magnetic drive field is employed to excite the precessional motion of the magnetization of a magnet. Besides this fundamental excitation, where all spins are precessing in an orchestrated, collective motion, higher order magnetic resonance modes can be excited and investigated using broadband microwave spectroscopy techniques. Furthermore, as these properties rely on the „magnetic“ bandstructure of the material, they can also be tailored using nano-fabrication methods yielding engineered magnetic structures such as waveguides or resonators.

We are looking for a talented master student, who is eager to explore the different possibilities for tailoring the dynamic magnetic properties of yttrium iron garnet (YIG). The goal of your thesis is to design, fabricate and investigate tailored magnetic bandstructures in YIG, in particular also in freely suspended films. The thesis work involves simulation of the (magnetic) structures, advanced nano-patterning, as well as high frequency spectroscopy of the fabricated devices.

Contact: Hans.Huebl@wmi.badw.deSebastian.Goennenwein@wmi.badw.de, Rudolf.Gross@wmi.badw.de

suitable as
  • Master’s Thesis Condensed Matter Physics
  • Master’s Thesis Applied and Engineering Physics
Supervisor: Sebastian Gönnenwein
Remote state preparation with quantum microwaves

One of the cornerstones of quantum communication is quantum teleportation which allows one to safely transmit an unknown quantum state. Similarly, in remote state preparation (RSP) a sender prepares a specific quantum state at a remote location. Propagating squeezed microwaves, which can nowadays be routinely prepared in the lab, can act as a quantum resource for the implementation of RSP. The goal of the current master project is to participate in the implementation of the RSP protocol on the basis of propagating squeezed microwaves and investigate related physics of the quantum entanglement generation and projective measurements. These steps involve cryogenic microwave measurements, programming of data acquisition devices, and experimental data analysis in the framework of quantum physics.
Techniques: Classical and quantum microwave technology; Cryogenics
Physics: Parametric amplifcation; Squeezing; Propagating quantum microwaves; Entanglement

Contact: Kirill.Fedorov@wmi.badw.de, Frank.Deppe@wmi.badw.de, Achim.Marx@wmi.badw.de, Rudolf.Gross@wmi.badw.de

suitable as
  • Master’s Thesis Condensed Matter Physics
  • Master’s Thesis Applied and Engineering Physics
Supervisor: Rudolf Gross

Current and Finished Theses in the Group

Defining manufacturing conditions for an electrochemical sensor
Abschlussarbeit im Masterstudiengang Physik (Physik der kondensierten Materie)
Themensteller(in): Rudolf Gross
magnetic fluctuations and superconductivity in FeSe
Abschlussarbeit im Masterstudiengang Physik (Physik der kondensierten Materie)
Themensteller(in): Rudolf Hackl

Condensed Matter

When atoms interact things can get interesting. Fundamental research on the underlying properties of materials and nanostructures and exploration of the potential they provide for applications.