A model for an intermediate valence four-site tetrahedral crystal, the smallest face-centered cubic crystal, is presented. It consists of one electron and four spin-orbitals per atom and a variety of interactions. Many-body eigenstates and eigenvalues of the Hamiltonian are calculated exactly with the aid of the symmetry of the crystal.
Bibliographical noteFunding Information:
This work was supported in part hg the National Science Foundation through Grant DMR X1-06494. .I.<‘. Parlehah would like to acknowledge fellowships from NATO and the Conservatoire National des Arts et M6tiers. R.H. Victora is the holder of an A.T. and ‘I‘. Bell Laboratories fellowship.