Superconductivity has been observed in moiré systems such as twisted bilayer graphene,
which host flat, dispersionless electronic bands. In parallel, theory work has discovered that …

The past decade has witnessed an explosion in the field of quantum materials, headlined by
the predictions and discoveries of novel Landau-symmetry-broken phases in correlated …

While regular flat bands are good for enhancing the density of states and hence the gap,
they are detrimental to the superfluid weight. We show that the predicted nontrivial topology …

The anomalous transport of important materials such as high-temperature superconductors
and other 'bad metals' is not well understood theoretically. In an incoherent metal, transport …

I review recent works on the symmetry and the structure of the superconducting gap in Fe-
based superconductors (FeSCs) and on the underlying pairing mechanism in these …

The European XFEL delivers up to 27000 intense (> 1012 photons) pulses per second, of
ultrashort (≤ 50 fs) and transversely coherent X-ray radiation, at a maximum repetition rate …

Topological flat bands, such as the band in twisted bilayer graphene, are becoming a
promising platform to study topics such as correlation physics, superconductivity, and …

Superconductivity in the iron pnictides is often closely connected to a nematic state in which
the tetragonal symmetry of the crystal is spontaneously broken. Determining the dominant …

Discovery of the new materials raised researchers' hopes of solving the riddle of high-
temperature superconductivity. But the unexpectedly diverse systems turned out to possess …

We investigate how emergent nematic order and nematic fluctuations affect several
macroscopic properties of both the normal and superconducting states of the iron pnictides …