Mechanism of superconductivity in the Hubbard model at intermediate interaction strength.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35947620.
- Also identified by DOI 10.1073/pnas.2205048119 and PMC identifier 9388079.
- Licence recorded as CC BY-NC-ND.
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Abstract
We study the fluctuations responsible for pairing in the <i>d</i>-wave superconducting state of the two-dimensional Hubbard model at intermediate coupling within a cluster dynamical mean-field theory with a numerically exact quantum impurity solver. By analyzing how momentum- and frequency-dependent fluctuations generate the <i>d</i>-wave superconducting state in different representations, we identify antiferromagnetic fluctuations as the pairing glue of superconductivity in both the underdoped and the overdoped regime. Nevertheless, in the intermediate coupling regime, the predominant magnetic fluctuations may differ significantly from those described by conventional spin fluctuation theory.