Academy of Finland
Funding decision
Applicant / Contact person Peotta, Sebastiano
Organisation Aalto University
Project title
Superfluidity, topology and disorder in lattice models with flat bands - SUPERFLAT
Decision No. 330384
Decision date 12.05.2020
Funding period 01.09.2020 - 31.08.2025
Funding 438 874
WebFOCUS Report
Project description
A quantum mechanical particle subject to a periodic potential possesses allowed energy regions (energy bands) separated by forbidden energy regions (band gaps). In some cases the energy interval corresponding to a band can shrink down to a single value and the band becomes flat. This means that the particle can not move and it is said to be localized. Motion in a flat band is enabled by interparticle interactions which allow the particles to move in pairs. The correlated motion of these so-called Cooper pairs is at the origin of superconductivity and it has been predicted that flat bands can dramatically enhance the critical temperature of the superconducting transition, even above room temperature. Disorder promotes localization and tends to destroy superconductivity. Since disorder is always present in solids, the goal of this project is to understand the effect of disorder on a superconductor living in a flat band.