Work

Triplet pairing, orbital selectivity, and correlations in iron-based superconductors

Year: 2025

Type: article

Abstract: We use a slave-boson approach to study the band renormalization and pair susceptibility in the normal state of iron-based superconductors in presence of strong Coulomb repulsion and Hund's interaction. Our results show orbital selectivity toward localization of $xy$ orbitals and its interplay with superconductivity. We also compare the recently proposed triplet resonating valence bond (tRVB) theory of superconductivity in iron-based superconductors with the more conventional ${s}_{\ifmmode\pm\else\textpm\fi{}}$ pairing. We show that both favor a superconductivity when the $xy$ orbital is delocalized, but the tRVB superconductivity supports a second weaker dome when $xy$ orbital is localized.

Source: Physical review. B./Physical review. B

DOI: 10.1103/nx2p-k972

Authors: Yashar Komijani, Elio König, Piers Coleman

Institutions: University of Cincinnati, Max Planck Institute for Solid State Research, Rutgers, The State University of New Jersey, University of London, Royal Holloway University of London

Language: English

Topic: Iron-based superconductors research

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, U.S. Department of Energy, Basic Energy Sciences

Awards: Programs on Critical Problems in Physics, Astrophysics and Biophysics at the Aspen Center for Physics, SPIN DRIVEN PHENOMENA IN STRONGLY CORRELATED MATERIALS