SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 27: Focus Session: Unconventional Transport Phenomena in Low-Dimensional Superconducting Heterostructures

Mittwoch, 29. März 2023, 09:30–13:00, HSZ 03

The investigation of new superconducting systems and effects is key to the development of superconducting electronics and quantum technologies. Recent studies have demonstrated that systems of low dimensionality in particular offer enormous possibilities for the realization of unconventional superconducting phases and quantum states. An effect hosted by low-dimensional superconducting systems is the supercurrent diode effect. The supercurrent diode effect was experimentally observed in 2020 and has since then been intensively investigated worldwide. The effect has been seen in a variety of low-dimensionality hybrid systems, such as two-dimensional van der Waals heterostructures, in magnetic proximity systems as well superlattices. The origin of the effect, however, is still under debate and several explanations have been proposed for its underlying mechanism including lack of inversion symmetry, spin-orbit coupling and screening effects. This Focus session will bring together the most recent developments in the field of superconducting effects in low-dimensionality systems and update the community on their physics and perspective applications, with particular attention to recent results related to the supercurrent diode effect.

Organizers: Wolfgang Belzig and Angelo Di Bernardo (Universität Konstanz)

09:30 TT 27.1 Hauptvortrag: Superconducting diode effect in Rashba superlattice — •Teruo Ono
10:00 TT 27.2 Hauptvortrag: Quasiparticle-based and Cooper-pair based superconducting diodes — •Maria Spies, Stefan Ilić, Sebastián Bergeret, Francesco Giazotto, and Elia Strambini
10:30 TT 27.3 Hauptvortrag: Non-reciprocal superconductivity and the field free Josephson diode — •Mazhar Ali
  11:00 15 min. break
11:15 TT 27.4 Investigating the mechanism behind the Josephson Diode Effect in NiTe2/superconductor Devices — •Emily C. McFarlane, Jonas A. Krieger, Mihir Date, Banabir Pal, Procopios C. Constantinou, Vladimir N. Strocov, Stuart S. P. Parkin, and Niels B. M. Schröter
11:30 TT 27.5 Reversal of the AC and DC supercurrent diode effect in ballistic Josephson junctionsAndreas Costa, Christian Baumgartner, Simon Reinhardt, Sergei Gronin, Geoffrey C. Gardner, Tyler Lindemann, Michael J. Manfra, Denis Kochan, Jaroslav Fabian, •Nicola Paradiso, and Christoph Strunk
11:45 TT 27.6 Theoretical study of the supercurrent diode effect in 2DEG Josephson junctions — •Andreas Costa, Denis Kochan, and Jaroslav Fabian
12:00 TT 27.7 Plasmons and dynamical screening in layered superconducting heterostructures — •Yann in 't Veld, Mikhail Katsnelson, Andrew Millis, and Malte Rösner
12:15 TT 27.8 Investigation of Nb gate-controlled superconducting nanoscale devices. — •Leon Ruf, Elke Scheer, and Angelo Di Bernardo
12:30 TT 27.9 Gate-controlled switching in non-centrosymmetric superconducting devices — •Jennifer Koch, Leon Ruf, Elke Scheer, and Angelo Di Bernardo
12:45 TT 27.10 Microscopic theory of gate-voltage mediated surface pair breaking and its impact on a superconducting wire — •Subrata Chakraborty, Danilo Nikolic, and Wolfgang Belzig
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