Sept. 15-20, 2019
ECASIA19: 18th European Conference on Applications of Surface and Interface Analysis
Sept. 13-20, 2019
|Summer School Spectroelectrochemistry, IFW Dresden|
|May 20/21, 2019||International Workshop "Topology meets materials – Weizmann meets Dresden", IFW Dresden|
|March 28/29, 2019|
|March 28/29, 2019||Joint workshop of BAM Berlin and IFW Dresden, IFW Dresden|
Dec. 4-5. 2018
|UKRATOP Workshop, IFW Dresden|
Oct. 1 – 2, 2018
SAW Symposium, Westin Bellevue Dresden, Dresden, Germany
|Aug. 28-30, 2018||Spin , waves & interactions 2018, Greifswald, Germany|
April 8- 11, 2018
667. WE-Heraeus-Seminar on System-oriented approach to thermoelectrics: Materials – Interfaces – Devices in Bad Honnef, Germany
March 11-16, 2018
Joint Conference of the Condensed Matter Divisions of the DPG and EPS,
Feb. 1, 2018
Workshop of the DFG Priority Programme 1458 “High Temperature Superconductivity in Iron Pnictides“, IFW Dresden
Jan. 29-31, 2018
EPSQMat 2018: International Workshop on Electron and photon spectroscopies of quantum materials: status and perspectives, IFW Dresden
|Ort||IFW Dresden D2E.27|
|Thema||Design of a 30 mK scanning tunneling microscope and first measurements on NbSe2 and Bi2201|
|Eingeladen von||Prof. Dr. Bernd Büchner|
|Ort||IFW Dresden D2E.27|
|Thema||Superconducting nanoscale devices
for on-chip generation and detection of microwave radiation
Most of superconductors in a magnetic field are penetrated by a lattice of quantized flux quanta, also known as Abrikosov vortices. In the presence of a transport current causing the vortices to cross sample edges, emission of electromagnetic waves is expected due to the continuity of tangential components of the fields at the surface. Usually, the radiated power levels are low because of small surface areas crossed by vortices and lacking coherence in the vortex motion.
In my talk, I will present two approaches to detect microwave radiation from vortex motion in Nb films and Mo/Si superlattices. In the Nb films, a periodic nanowire antenna placed near the film surface allows for the detection of the ac voltage induced by coherently moving fluxons. As distinct from this, the internal periodicity of the structure itself is exploited for tuning the vortex dynamics into a coherent fashion resulting in robust microwave emission in the Mo/Si superlattice.
In all, it will be demonstrated that the lattice of Abrikosov vortices in superconductors can act as a dc-tunable microwave generator bridging the frequency gap between conventional radiofrequency oscillators and (sub-)terahertz generators relying upon the Josephson effect.
In addition, I will dwell on the interaction of the vortex lattice with spin waves in superconductor / ferromagnet hybrides  and the phenomenon of microwave-stimulated superconductivity in the vortex state .
|Eingeladen von||Prof. Dr. Vladimir Fomin|
The Dresden Science Calendar supports interdisciplinary research in Dresden by collecting, structuring and distributing announcements of upcoming scientific talks via a unified internet platform. It allows anyone to browse all seminar announcements and to subscribe to filtered information.
To the Dresden Science Calendar