Synergy between Hund-Driven Correlations and Boson-Mediated Superconductivity

Laura Fanfarillo, Angelo Valli, and Massimo Capone
Phys. Rev. Lett. 125, 177001 – Published 21 October 2020
PDFHTMLExport Citation

Abstract

Multiorbital systems such as the iron-based superconductors provide a new avenue to attack the long-standing problem of superconductivity in strongly correlated systems. In this work we study the superconductivity driven by a generic bosonic mechanism in a multiorbital model including the full dynamical electronic correlations induced by the Hubbard U and the Hund’s coupling. We show that superconductivity survives much more in a Hund’s metal than in an ordinary correlated metal with the same degree of correlation. The redistribution of spectral weight characteristic of the Hund’s metal reflects also in the enhancement of the orbital-selective character of the superconducting gaps, in agreement with experiments in iron-based superconductors.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 2 December 2019
  • Accepted 17 September 2020

DOI:https://doi.org/10.1103/PhysRevLett.125.177001

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Laura Fanfarillo1,2, Angelo Valli1,3, and Massimo Capone1

  • 1Scuola Internazionale Superiore di Studi Avanzati (SISSA) and CNR-IOM, Via Bonomea 265, 34136 Trieste, Italy
  • 2Department of Physics, University of Florida, Gainesville, Florida 32611, USA
  • 3Institute for Solid State Physics, Vienna University of Technology, 1040 Vienna, Austria

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 125, Iss. 17 — 23 October 2020

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×