2017/01/20 by P. I. Arseev, S. O. Loiko, N. K. Fedorov
Materials Science · Physics and Astronomy · #Atomic orbital #Condensed matter physics #Electron #Electronic band structure #Fermi level #Iron-based superconductors research #Isotropy #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #Solid-state physics #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1134/s0021364017180011
6 pages, 4 figures
arxiv created 2017/01/20 · openalex publication_date 2017/09/01 · arxiv updated 2017/10/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that in contrast to the free electron model (standard BCS model), a particular gap in the spectrum of multiband superconductors opens at some distance from the Fermi energy, if conduction band is composed of hybridized atomic orbitals of different symmetries. This gap has composite superconducting-hybridization origin, because it exists only if both the superconductivity and the hybridization between different kinds of orbitals are present. Therefore, for many classes of superconductors with multiorbital structure such spectrum changes should take place. These particular changes in the spectrum at some distance from the Fermi level result in slow convergence of the spectral weight of the optical conductivity even in quite conventional superconductors with isotropic s -wave pairing mechanism.