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Instability of Pa CsC at ambient pressure and superconducting state of the FCC phase
Changming Yue, Yusuke Nomura, Kosmas Prassides +1
The alkali-doped fulleride CsC, crystallized in the space group Fmm or Pmn, exhibits unconventional -wave superconductivity under pressure…
Maximum entropy analytic continuation of anomalous self-energies
Changming Yue, Philipp Werner
The anomalous self-energy plays an important role in the analysis of superconducting states. Its spectral weight provides information on the pairing glue of superconductors, but it…
Superconductivity enhanced by pair fluctuations between wide and narrow bands
Changming Yue, Hideo Aoki, Philipp Werner
Full or empty narrow bands near the Fermi level are known to enhance superconductivity by promoting scattering processes and spin fluctuations. Here, we demonstrate that doublon-ho…
Eliashberg theory of the Jahn-Teller-Hubbard model
Yoshikuni Kaga, Philipp Werner, Shintaro Hoshino
We study a multiorbital Hubbard model coupled to local Jahn-Teller phonons to investigate the superconducting state realized in fullerides. A weak-coupling approach is employed in…
Superconductivity in black phosphorus and the role of dynamical screening
Viktor Christiansson, Francesco Petocchi, Philipp Werner
Simple cubic phosphorus exhibits superconductivity with a maximum of up to 12 K under pressure. The pressure dependence of cannot be consistently explained with a simpl…
Pairing enhanced by local orbital fluctuations in a model for monolayer FeSe
Changming Yue, Philipp Werner
The pairing mechanism in different classes of correlated materials, including iron based superconductors, is still under debate. For FeSe monolayers, uniform nematic fluctuations h…