Unconventional pairing in single FeSe layers

2017/10/31 by Jasmin Jandke, Fang Yang, Patrik Hlobil +7 · 21 citations
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Condensed matter physics #Corporate Taxation and Avoidance #Coupling (piping) #Cuprate #Electron #Electron pair #Electronic and Structural Properties of Oxides #Iron-based superconductors research #Materials science #Pairing #Phonon #Physics #Quantum mechanics #Superconductivity #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.100.020503

published in Physical review. B./Physical review. B 100(2) (American Physical Society) · 10 pages, 7 figures

arxiv created 2018/08/01 · openalex publication_date 2019/07/11 · arxiv updated 2019/07/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Superconductivity in single FeSe layers on SrTiO₃ shows a much higher critical temperature T_c than in bulk FeSe, illustrating the potential of interface engineering. Yet the underlying mechanism of boosting T_c is not understood. Both conventional and unconventional pairing mechanisms have been suggested to be responsible for this effect. Here, the authors show experimentally that phonons do not contribute significantly to the high T_c but instead the intrinsic spin fluctuations of the electrons themselves lead to Cooper pairing.

Citations

• Strong interplay between stripe spin fluctuations, nematicity and superconductivity in FeSe
• Tuning the band structure and superconductivity in single-layer FeSe by interface engineering
• Superconductivity above 100 K in single-layer FeSe films on doped SrTiO3
• A Relation between the Resonance Neutron Peak and ARPES Data in Cuprates
• Theory of magnetic excitations in iron-based layered superconductors
• Interface induced high temperature superconductivity in single unit-cell FeSe films on SrTiO3

Cited by

• Multichannel superconductivity of monolayer FeSe on SrTiO3: Interplay of spin fluctuations and electron-phonon interaction