Title: Josephson nano-devices for spintronic applications
Speaker: Prof. Kartikeswar Senapati, Physical Sciences, NISER
Date : Friday, 5th April 2024 at 4 pm
Venue : CeNSE Seminar Hall
Abstract:
Spin-orbit interactions in solid state systems have added a new paradigm to the present day spintronics research. Spin-momentum locking at the Fermi surface, due to the spin-orbit interactions, has opened the possibility of creating spin-polarization without using any magnetic layer[1]. Superconducting devices such as Josephson junctions and SQUIDs, though operating at low temperatures, can be very useful in situations dealing with spin-accumulation or polarization. In this talk I will primarily focus on one of our recent experiments [2] on detection of Rashba-Edelstein effect (in-plane spin polarization due to charge current at a Rashba interface) using planar Josephson nano junctions, directly built onto a Pt/Cu Rashba interface. I will start with the basic idea of the experiment and describe the results and limitations of the technique. Apart from this, I will also briefly discuss a few other ongoing activities in our lab concerning nanoscale superconducting devices.
[1] Manchon et al., Nature Materials 14, 871 (2915)
[2] Tapas Senapati et al., Nature Communications 14, 7415 (2023)
Host Faculty: Prof. Dhavala Suri