We discuss the local moment and specific heat of the two-dimensional half-f
illed Hubbard model. For small values of U the local moment displays not on
ly a strucure at T similar to U, but also an additional increase at low T.
leading to a two-peak structure for C(T) down to U = t. (C) 2001 Elsevier S
cience B.V. All rights reserved.