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Weekly program 13.11.2017 – 19.11.2017
Dr. Martin Hohenadler (Universität Würzburg)
Competing Orders in Luttinger and Dirac Liquids
Seminar TPII/III EPVI, Sonderseminar TRR80, room: S-288
Dr. Ivan Leonov
Electronic Structure, Magnetic Properties, and Phase Stability of Correlated Materials
Lehrstuhlseminar Theoretische Physik III, room: S-439
Dr. Dirk Wulferding (Institute for Condensed Matter Physics, TU Braunschweig and Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science, POSTECH, Korea)
Magnetic force microscopy beyond imaging - from low energy condensed matter physics to high energy particle physics

Magnetic force microscopy (MFM) - a scanning probe technique based on atomic force micros-copy - has established itself as a valuable tool to uncover magnetic domain structures and their formation on the sub-micrometer scale [1,2]. On the other hand, the magnetically coated tip can serve as a local probe to characterize important properties of superconducting samples. We have designed and constructed a low temperature, 3He magnetic force microscope operating within a three-axis vector magnet with field ranges of 2-2-9 T in x-y-z direction [3]. We demonstrate how to employ this system to investigate intrinsic properties of superconduc-tors, such as the pinning force of Abrikosov vortices, as well as the London penetration depth [4], which can yield valuable information about the superconducting gap symmetry. In addi-tion, we introduce the experimental realization of a model system to study quark confinement through Abrikosov vortices in superconductors [5].

[1] J. Jeong, et al., Phys. Rev. B 92, 054426 (2015). [2] D. Wulferding, et al., Sci. Rep. 7, 46296 (2017). [3] J. Yang, et al., Rev. Sci. Instrum. 87, 023704 (2016). [4] D. Wulferding, et al., Phys. Rev. B 92, 014517 (2015). [5] J. Yang, et al., in preparation.

Sonderseminar TRR80, room: S-403