On interband pairing in multiorbital systems
Adriana Moreo, Maria Daghofer, Andrew Nicholson, Elbio Dagotto
TL;DR
This paper explores how strong orbital hybridization in multiband superconductors can induce intra and interband pairing, providing theoretical insights and spectral function calculations to aid experimental detection.
Contribution
It introduces a symmetry-based mean-field framework to analyze interband pairing driven by orbital hybridization in multiorbital systems.
Findings
Hybridization can lead to both intra and interband pairing.
Spectral functions reveal signatures of interband pairing.
Guidelines for experimental detection of multiband superconductivity.
Abstract
The discovery of high- superconductivity in the pnictides, materials with a Fermi surface determined by several bands, highlights the need to understand how superconductivity arises in multiband systems. In this effort, using symmetry considerations and mean-field approximations, we discuss how strong hybridization among orbitals may lead to both intra and interband pairing, and we present calculations of the spectral functions to guide the experimental search for this kind of state.
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