Stripes, Antiferromagnetism and the Pseudogap in the Doped Hubbard Model from Minimally Entangled Typical Thermal States

Cet événement aura lieu en ligne, inscription à solliciter auprès de Mme Carmen Toderasc :

The phase diagram of the two-dimensional Hubbard model poses one of the most interesting conundrums in contemporary condensed matter physics. While describing essential aspects of high-temperature superconductors, it remains a paradigmatic model embodying the complexity of the ‘strong correlation problem’. In this talk, I demonstrate how our recent advances in tensor network methods allow us to perform controlled and accurate simulations ranging from the high-temperature incoherent limit down to essentially the ground state regime on finite cylinders. Focusing on the hole-doped square lattice at strong coupling, we discover a novel phase characterized by commensurate short-range antiferromagnetic correlations and a small nodal charge gap at temperatures above the half-filled stripe phase extending to zero temperature. These features bear a strong resemblance to the pseudogap regime of cuprate superconductors.

This talks is broadcasted live on zoom.
It is also recorded and will be made available on the website of the lecture series.