Checkerboard density of states in strong-coupling superconductors
Alexandrov, A. S.
Original · EN
The Bogoliubov-de Gennes (BdG) equations are solved in the strong-coupling limit, where real-space (preformed) pairs bose-condense with finite center-of-mass momenta. There are two energy scales in this regime, a temperature independent incoherent gap Δₚ and a temperature dependent coherent gap Δc (T), modulated in real space. The single-particle density of states (DOS) reveals checkerboard modulations similar to the tunnelling DOS in cuprates.
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