2021/09/30 by Changming Yue, Philipp Werner · 8 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Iron-based superconductors research #Lattice (music) #Liquid crystal #Magnetic and transport properties of perovskites and related materials #Materials science #Mean field theory #Monolayer #Monte Carlo method #Nanotechnology #Pairing #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rigidity (electromagnetism) #Superconductivity #Superfluidity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.104.184507
published in Physical review. B./Physical review. B 104(18) (American Physical Society) · 11 pages, 7 figures
arxiv created 2021/09/30 · openalex publication_date 2021/11/12 · arxiv updated 2021/11/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The pairing mechanism in different classes of correlated materials, including iron-based superconductors, is still under debate. For FeSe monolayers, uniform nematic fluctuations have been shown in a lattice Monte Carlo study to play a potentially important role. Here, using dynamical mean-field theory calculations for the same model system, we obtain a similar phase diagram and provide an alternative interpretation of the superconductivity in terms of local orbital fluctuations and phase rigidity. Our study clarifies the relation between the superconducting order parameter, superfluid stiffness, and orbital fluctuations, and provides a link between the spin/orbital freezing theory of unconventional superconductivity and theoretical works considering the role of nematic fluctuations.