Group Seminar via Zoom:  Light-induced superconductivity via dynamical Hubbard U

Michael Sentef, Theory, MPI Structure and Dynamics of Matter, Hamburg
Group meeting via video conference (Zoom)
Tuesday, January 19th, 9:00 (MEZ)

Dealing with the unique situation of partial lock downs worldwide and home office solutions at our Institute due to the current spreading of the Covid 19 virus, we are now holding our group seminars and journal clubs via video conference. This procedure enables us to continue our research, enhance discussions and exchange important information.

Abstract:

Light-induced superconducting optical responses have been experimentally observed in a variety of materials, including high-T_c cuprates [1,2] and alkali-doped fullerides [3,4]. Despite intense theoretical efforts, a comprehensive and microscopic understanding of light-induced superconductivity has not been fully reached yet. More recently, a new class of materials has been added to the picture, namely two-dimensional organic conductors [5], whose basic phenomenology can be understood via a frustrated 2D Hubbard model on an anisotropic triangular lattice. In this talk, I will discuss a possible connection of light-induced superconductivity to dynamically modified Hubbard U in the organic material [6], and raise the question whether the experimentally inspired theoretical prediction of phase-coherent eta pair states in driven Hubbard models with dynamical U can be tested by quantum simulation with ultracold fermions.

[1] W. Hu et al., Nat. Mater. 13, 705 (2014)
[2] R. Mankowsky et al., Nature 516, 71 (2014)
[3] M. Mitrano et al., Nature 530, 461 (2016)
[4] A. Cantaluppi et al., Nat. Phys. 14, 837 (2018)
[5] M. Buzzi et al., Phys. Rev. X 10, 031028 (2020)
[6] J. Tindall et al., Phys. Rev. Lett. 125, 137001 (2020)

In the afternoon there will be a discussion at 16:00 (4:00pm MEZ) with Michael to see if we can make see enhanced pairing from dynamic U in our experiments

If you would like to join our group seminars via Zoom, please contact us for more information.