Thermodynamics of an Extended Hubbard-Model Chain. II. Strong-Coupling Limit.

摘要

For an infinite linear chain we consider the strong-coupling (U to infinity) limit of an extended Hubbard Hamiltonian which takes into account the nearest-neighbor interatomic Coulomb repulsion. It is shown that the magnetic susceptibility obeys a Curie law, and, to this effect, a theorem is proved pertaining to the partition function. The specific heat is computed for the quarter-filled band to lowest order in the transfer integral. The density-density correlation function and the specific heat are also obtained in the atomic limit for an arbitrary density.