Theory of the bound state of4fexcitations and magnetic resonance in unconventional superconductors

2009/02/26 by Alireza Akbari, Ilya Eremin, Peter Thalmeier +1 · 7 citations
Business, Management and Accounting · Materials Science · Mathematics · Physics and Astronomy · #Algorithm #Bound state #Condensed matter physics #Corporate Taxation and Avoidance #Electron #Excitation #Ion #Iron-based superconductors research #Mathematics #Physics #Quantum mechanics #Rare-earth and actinide compounds #State (computer science) #Superconductivity #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.80.100504

published in Physical Review B 80(10) (American Physical Society) · 5 pages, 3 figures

arxiv created 2009/02/26 · openalex publication_date 2009/09/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We analyze the influence of unconventional superconductivity on crystalline electric-field (CEF) excitations of rare-earth ions in layered superconductors. We show that resonant magnetic excitations of the conduction electrons that have been observed in these systems below T_c may result in the formation of the bound state in the 4f-electron susceptibility at energies well below the CEF excitation energy. Our results are in agreement with the observed increase of the linewidth of CEF excitations below T_c in superconducting ferropnictides and support the s^\ifmmode±\else\textpm\fi Cooper-pairing state in these compounds.

Citations

• Magnetic Resonance in the Spin Excitation Spectrum of Electron-Doped Cuprate Superconductors
• Crystalline Electric Field as a Probe for Long-Range Antiferromagnetic Order and Superconducting State ofCeFeAsO1−xFx
• Spin Resonance in thed-Wave SuperconductorCeCoIn5
• The effect of collective spin-1 excitations on electronic spectra in high-Tcsuperconductors
• Theory of magnetic excitations in iron-based layered superconductors