  We investigate the thermodynamic properties of a half-filled SU(2N)
Fermi-Hubbard model in the two-dimensional square lattice using the
determinantal quantum Monte Carlo simulation, which is free of the fermion
"sign problem". The large number of hyperfine-spin components enhances spin
fluctuations, which facilitates the Pomeranchuk cooling to temperatures
comparable to the superexchange energy scale at the case of SU$(6)$. Various
quantities including entropy, charge fluctuation, and spin correlations have
been calculated.
