1995/09/05 by G. Varelogiannis, L. Pietronero
Materials Science · Physics and Astronomy · #Boson #Condensed matter physics #Coulomb #Coupling (piping) #Electron #Iron-based superconductors research #Materials science #Phonon #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #Relaxation (psychology) #cond-mat
paper · pdf · doi:10.1103/physrevb.52.r15753
Accepted for publication in the Rapid Communications section of Physical Review B, 4 pages latex (revtex),4 figures available upon request to [email protected]
arxiv created 1995/09/05 · openalex publication_date 1995/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We address the question of whether boson mediators of high-Tc superconductivity are composite (electronic) or independent phonons. For s-wave superconductivity we show from the available experiments that the hypothesis of composite bosons is rather unlikely. Our analysis points naturally towards phonon mediators. In addition we point out that the eventual presence of a peak in the temperature dependence of the microwave conductivity while the Hebel-Slichter peak is absent in the temperature dependence of the NMR relaxation rate can be understood within a phonon mechanism if one takes into account the modulation of the electron-phonon coupling (predominance of forward scattering) induced by Coulomb correlation of the carriers.