5 papers
Extracting the pairing gap from van Hove singularities in rf spectra of the Fermi Hubbard model
Chuping Li, Kaichao Zhang, Junru Wu +5
We show that van Hove singularities in rf spectra of the 3D attractive Fermi Hubbard model provide a robust route to extracting the pairing gap. Four types of singularities are cla…
Rf spectra and pseudogap in ultracold Fermi gases across the BCS-BEC crossover from pairing fluctuation theory
Chuping Li, Lin Sun, Kaichao Zhang +5
The pseudogap phenomenon is a hallmark of strongly interacting Fermi systems, from high-temperature superconductors to ultracold atomic gases, yet its precise origin remains debate…
Spectral study of the pseudogap in unitary Fermi gases
Chuping Li, Lin Sun, Kaichao Zhang +5
The existence of a pseudogap in unitary Fermi gases has recently been established and measured experimentally [Li et al., Nature 626, 288 (2024)]. This lends strong support for the…
Geometric superfluid stiffness of Kekulé superconductivity in magic-angle twisted bilayer graphene
Ke Wang, Qijin Chen, Rufus Boyack +1
Superconductivity in twisted graphene is probed by tunneling spectroscopy and superfluid stiffness, two observables that access the same order parameter from complementary perspect…
Effects of particle-hole fluctuations on the superfluid transition in two-dimensional atomic Fermi gases
Junru Wu, Zongpu Wang, Lin Sun +6
Proper treatment of the many-body interactions is of paramount importance in our understanding of strongly correlated systems. Here we investigate the effects of particle-hole fluc…