Events

 
<< November 2022 >>
 
 >>
 >>
 >>
 >>
 >>
Sun Mon Tue Wed Thu Fri Sat
   1   2   3   4   5 
 6   7   8   9   10   11   12 
 13   14   15   16   17   18   19 
 20   21   22   23   24   25   26 
 27   28   29   30   
 
Add an Event Edit This Event
<< Summer 2022 Fall 2022 Spring 2023 >>
Subscribe your calendar or receive email announcements of events
R. G. Herb Condensed Matter Seminar
Scanning tunneling spectroscopy of unconventional superconductors
Date: Thursday, November 10th
Time: 10:00 am - 11:00 am
Place: 5310 Chamberlin
Speaker: Pavlo Sukhachov, Yale
Abstract: Motivated by recent experimental observations of unconventional superconductivity in twisted bilayer and trilayer graphenes, we develop a theory describing the differential conductance between a normal STM tip and a 2D superconductor with an arbitrary gap structure. Our analytical scattering theory accounts for Andreev reflections, which become prominent at larger transmission between the tip and the superconductor. Exploiting the dependence of Andreev reflection on the relative position of the STM tip with respect to the lattice symmetry points, we show that the structure of the superconducting gap can be extracted by combining weak- and strong-tunneling limits of differential conductance. Furthermore, the theory incorporates a tip-induced scattering potential within the 2D material, which allows us to describe subgap resonances.
Host: Alex Levchenko
Add this event to your calendar