Strain-enhanced superconductivity in atomically thin materials

Date: 19 April 2017

Venue: University of Antwerp - Building U, room U.241 - Groenenborgerlaan 171 - 2020 Antwerpen

Time: 4:00 PM - 5:00 PM

Organization / co-organization: Condensed Matter Theory

Short description: Condensed Matter Theory seminar presented by Jonas Bekaert

Strain-enhanced superconductivity in atomically thin materials


Superconductivity in atomically thin materials (down to a single monolayer) emerged in the last decade, in the slipstream of research on graphene and related materials. Here, I will explore the effect of strain on the superconducting properties of these materials. Using evidence from the literature as well as my own results, I will show that - contrary to common prejudice - superconductivity in such thin films is greatly enhanced by applying tensile strain. I will reveal the mechanism behind this enhancement and I will show that it is much stronger and more consequential in the system I have studied, namely monolayer MgB2, than in previous attempts. The method used to arrive at these conclusions combines first-principles calculations of electronic states, phonons and coupling between those two with a generalized theory for Cooper pairing.

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