Seminar on Condensed Matter Theory
Group of Theoretical Physics at the Department of Condensed Matter Physics
of Charles University has a pleasure to invite you to attend the seminar
on 29th May 2025 at 13:00
at Faculty of Mathematics and Physics of Charles University, Ke Karlovu 5, 121 16 Praha 2
Seminar room F 052
Stefano Trivini
CIC Nanogune, Donostia-San Sebastián
Many-body superconducting excitations at the atomic scale
29. 05. 2025 13:00
Stefano Trivini » Many-body superconducting excitations at the atomic scale
CIC Nanogune, Donostia-San Sebastián
Location: Lecture room F2, MFF UK (first floor, Ke Karlovu 5, Praha 2)
High resolution STM spectroscopy is a powerful tool to study superconducting excitations at the atomic scale. I will explore this on two systems.
The first, is a molecular spin (FeTPP-Cl) deposited on a proximitized Au/V substrate. The interaction between the exchange coupling and anisotropy gives raise to multiple many-body excitations inside and outside the superconducting gap, which we describe with a single-site superconductor model.
The second, consists of Pb islands on graphene, where Coulomb blockade and superconductivity coexist. We observe asymmetric quasiparticle and Josephson currents due to an excess charge present on the island. Applying tip bias pulses, we tune this charge acting as an effective gating. This allows the measurements of gate-dependence dIdV maps without a gate electrode and the tuning of the transport asymmetry, realizing a switchable Cooper pair diode.
For more information follow: https://kfkl.mff.cuni.cz
If you wish to receive regular updates on fothcoming seminars, contact K. Carva.
If you wish to receive regular updates on fothcoming seminars, contact K. Carva.
