Within the seminar students give talks on current topics in condensed matter physics. The seminar aims to give a closer look at new developments in condensed matter physics and to show how these developments can be transferred into applications. The seminar focuses on spin electronics, spin dynamics, solid-state quantum information processing, the physics of solid-state nanostructures, and high temperature superconductivity (including the recently discovered FeAs superconductors). These topics are in the focus of several research programs of WMI and collaborative research programs in the Munich area (e.g. the Excellence Cluster "Munich Center for Quantum Science and Technology (MCQST)", the Collaborative Research Center TRR 80, the DFG Priority Program 2137, or the EU Project QMiCS).

The seminar is relevant for the special courses on "Superconductivity and Low Temperature Physics" as well as on "Magnetism and Spintronics". It is suitable for bachelor students in the 5th semester or higher and for master students.

List of open topics for seminar talks in WS 2021/22

1. Precision tomography of a three-qubit donor quantum processor in silicon (Mateusz T. Mądzik, et al., Nature 601, 348-353 (2022))

2. Supercurrent rectification and magnetochiral effects in symmetric Josephson junctions (C. Baumgartner et al., Nature Nanotechnology 17, 39-44 (2022))

3. Superconducting electro-mechanics to test Diósi–Penrose effects of general relativity in massive superpositions (M. F. Gely et al., AVS Quantum Sci. 3, 035601 (2021))

4. Detecting spins by their fluorescence with a microwave photon counter (E. Albertinale et al., Nature 600, 434-438 (2021))

5. Antiferromagnetic half-skyrmions and bimerons at room temperature (H. Jani et al., Nature 590, 74 (2021))

6. Quantum anomalous Hall octet driven by orbital magnetism in bilayer graphene (F.R. Geisenhof et al., Nature 598, 53 (2021))

7. Direct Imaging of Current-Induced Antiferromagnetic Switching Revealing a Pure Thermomagnetoelastic Switching Mechanism in NiO (H. Meer et al., Nano Lett. 21, 114 (2021))

8. Magnetic order of Dy³⁺ and Fe³⁺ moments in antiferromagnetic DyFeO₃ probed by spin Hall magnetoresistance and spin Seebeck effect (G.R. Hoogeboom et al., Phys. Rev. B 103, 134406 (2021))

9. Quantum Simulation of the Bosonic Creutz Ladder with a Parametric Cavity (Jimmy S. C. Hung et al., Phys. Rev. Lett. 127, 100503 (2021))

10. Experimental Realization of a Protected Superconducting Circuit Derived from the 0–p Qubit (András Gyenis et al., PRX Quantum 2, 010339 (2021))

11. Unconventional quantum vortex matter state hosts quantum oscillations in the underdoped high-temperature cuprate superconductors (Yu-Te Hsu et al., PNAS 118, e2021216118 (2021))

12. Landau quantization and highly mobile fermions in an insulator (Pengjie Wang et al., Nature 589, 225–229 (2021))

13. Linear-in temperature resistivity from an isotropic Planckian scattering rate (Gaël Grissonnanche, et al., Nature 595, 667-672 (2021))

14. Incoherent transport across the strange-metal regime of overdoped cuprates (J. Ayres et al., Nature 595, 661-666 (2021))

15. Pauli-limit violation and re-entrant superconductivity in moiré graphene (Yuan Cao et al., Nature 595, 526-531 (2021))

16. Highly tunable junctions and non-local Josephson effect in magic-angle graphene tunnelling devices (Daniel Rodan-Legrain et al., Nature Manotechnology , (2021))

17. Observation of the antiferromagnetic spin Hall effect (Xianzhe Chen et al., Nature Materials 20, 800-804 (2021))

18. Quantum Microwave Radiometry with a Superconducting Qubit (Zhixin Wang et al., Phys. Rev. Lett. 126, 180501 (2021))

19. Layer-by-Layer Growth of Complex-Shaped Three-Dimensional Nanostructures with Focused Electron Beams (Luka Storic et al., Nano Letters 20, 184-191 (2020))

20. Polarizing an antiferromagnet by optical engineering of the crystal field (Ankit S. Disa et al., Nature Phys. 16, 937 (2020))

21. Non-local spin Seebeck effect in the bulk easy-plane antiferromagnet NiO (G.R. Hoogeboom & B.J. van Wees, Phys. Rev. B 102, 214415 (2020))

22. Absence of Evidence of Electrical Switching of the Antiferromagnetic Néel Vector (C.C. Chiang et al., Phys. Rev. Lett. 123, 227203 (2019))

23. Magnon Valve Effect between Two Magnetic Insulators (H. Wu et al., Phys. Rev. Lett. 120, 097205 (2018))

List of assigned topics (no longer open):

1. Julian Franz: Cascaded superconducting junction refrigerators: Optimization and performance limits (A. Kemppinen et al., Applied Physics Letters 119, 052603 (2021)), Advisor: Rudolf Gross

2. Meike Pfeiffer: Observation of first and second sound in a BKT superfluid (P. Christodoulou et al., Nature 594, 191 (2021)), Advisor: Matthias Opel

3. Ferdinand Menzel: All-electric magnetization switching and Dzyaloshinskii–Moriya interaction in WTe₂/ferromagnet heterostructures (Shuyuan Shi et al., Nature Nanotechnology 14, 945-949 (2019)), Advisor: Matthias Althammer

4. Michael Schmidlechner: Quantum-enhanced nonlinear microscopy (Catxere A. Casacio et al., Nature 594, 201 (2021)), Advisor: Rudolf Gross

5. Ramona Stumberger: Observation of Unconventional Charge Density Wave without Acoustic Phonon Anomaly in Kagome Superconductors AV₃Sb₅ (A=Rb,Cs) (H. Li et al., Phys. Rev. X 11, 031050 (2021)), Advisor: Rudi Hackl)