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Advanced Seminar SS 20

Magnetic Materials

Mo. 14:00-15:00 h in the Seminar Room 202 of the II. Physikalisches Institut, University of Cologne.

Magnetic materials represent one the most important classes of functional solid-state materials. With the navigational compass, such materials are used since centuries. However, apart from inducing (ferro-)magnetic order, magnetic interactions form the basis of a plethora of sophisticated physical phenomena, which are in the focus of modern condensed-matter research. For example, the origin of high-temperature superconductivity is assigned to magnetic correlations. Competing magnetic interactions result in magnetic frustration, which can induce so-called spin-liquid phases. Magnetic frustration is also a source for the coupled magnetic and ferroelectric order in multiferroic systems, which are of interest for new types of data storage devices. The electronic band structure depends on spin-orbit coupling and under certain conditions so-called topological insulators evolve, which are insulating in the bulk but host metallic surface states.

Within this Advanced Seminar several of these phenomena will be introduced and discussed by the students. The seminar talks shall focus on the experimental signatures of these phenomena in different materials and present the experimental techniques used for their observation.

Organisational meeting

INFO concerning the measures against the spread of the Corona virus

The Advanced Seminar talks are given via online video conferences. Due to the delayed start of this lecture time all seminar talks are shifted  to the 2nd half of the lecture time and the Advanced Seminar is combined with talks of the weekly seminar of the Insitute of Physics 2. Thus, the talks will be given either on Mondays at 14:00 or Wednesdays at 13:00.


Date Title Tutor Speaker  
10.06. Charge density waves in VS2 monolayers   C. van Efferen pdf
17.06. Strong Cs doping of mono- and bilayer graphene   N. Ehlen pdf
24.06. Relaxation behavior of multiferroic domains   S. Biesenkamp pdf
29.06. Optically induced transition in RuCl3 P. van Loosdrecht K. Hopfer pdf
01.07. Terahertz phase measurements on subwavelength-size samples   D. Maluski pdf
06.07. Field-induced quantum criticality in spin-chain and spin-ladder materials T. Lorenz L. Thomas pdf
08.07. Monopole dynamics in the spin ice Dy2Ti2O7 C. Grams R. Fister  
13.07. Magnetism of ruthenates M. Braden F. Wirth pdf
15.07. RIXS interferometry on spin-orbit-entangled moments in cluster Mott insulators   M. Magnaterra  

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Registration for Advanced Seminar