Hidden Pseudogap and Excitation Spectra in a Strongly Coupled Two-Band Superfluid/Superconductor
نویسندگان
چکیده
We investigate single-particle excitation properties in the normal state of a two-band superconductor or superfluid throughout Bardeen-Cooper-Schrieffer (BCS) to Bose-Einstein-condensation (BEC) crossover, within many-body T-matrix approximation for multi-channel pairing fluctuations. address density states and spectral functions consisting two contributions associated with waekly interacting deep band strongly shallow band, relevant iron-based multiband superconductors multicomponent fermionic superfluids. show how pseudogap is hidden by contribution BCS-BEC crossover. Our results could explain missing recent scanning tunneling microscopy experiments FeSe superconductors.
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ژورنال
عنوان ژورنال: Condensed matter
سال: 2021
ISSN: ['2410-3896']
DOI: https://doi.org/10.3390/condmat6010008