Moire Materials Group Meeting

Thursday Mar 25, 2021, 11:30 AM → 1:00 PM America/New_York

Speaker: Liang Fu

3-particle mechanism for unconventional superconductivity: theory and material realization

I will present a new mechanism for superconductivity from strong electron-electron repulsion in multi-band systems. When the kinetic energy is small,
the dynamics of nearby electrons on the lattice is strongly correlated. I will show by a controlled expansion in the kinetic term that pairing can be induced by correlated tunneling of 3 particles. This effect can also be viewed as exciton-mediated pairing in real space. Possible realizations of this idea leading to spin-triplet superconductivity will be discussed. 

Based on works with Valentine Crepel and Kevin Slagle:
[1] V. Crepel and L. Fu, arXiv:2012.08528 
[2] V. Crepel and L. Fu, to appear
[3] K. Slagle and L. Fu, arXiv:2003.13690

Recording link