Work

Unconventional superconductivity mediated by nematic fluctuations in a multiorbital system: Application to doped FeSe

Year: 2025

Type: article

Abstract: In unconventional superconductors, pairing is believed to be of electronic origin, and linked to critical collective fluctuations. Here, the authors investigate how nematic fluctuations, responsible for orbital polarization, mediate pairing in doped FeSe. They show that nematic-mediated pairing is highly unconventional and leads to a highly anisotropic gap structure. This in turn gives rise to pronounced non-BCS behavior of observables. The authors compute thermodynamic, spectroscopic, and transport characteristics, find good agreement with the experimental data, and propose further experiments to test their predictions.

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

DOI: 10.1103/physrevb.111.094503

Authors: Kazi Ranjibul Islam, Andrey Chubukov

Institution: University of Minnesota

Language: English

Topic: Iron-based superconductors research

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, University of Minnesota

Award: NOVEL PHYSICS IN IRON‐BASED SUPERCONDUCTORS