Pseudogap, van Hove singularity, maximum in entropy, and specific heat for hole-doped Mott insulators

The decrease of the spin susceptibility below a doping-dependent temperature is a signature of the problem of the pseudogap in cuprate superconductors. This paper proposes that the pseudogap is a finite-doping extension of the Mott transition where near-neighbor singlet correlations play a crucial role and propose several experimental tests to check on this prediction.