Peter J. Price
Surface Science
We have studied the spectrum of low-spin eigenstates of a spin-(1/2 Heisenberg model on 4×4 square lattices with up to third-neighbor antiferromagnetic exchange interactions. We have computed the staggered susceptibility, spin-spin correlation function, and the overlap of the exact ground state with various variational spin-density-wave ordered states as well as with the equal-amplitude, nearest-neighbor resonating-valence-bond state (which is the prototypical short-ranged RVB state). We find evidence for a complicated phase diagram with a region in which a short-ranged RVB state may be the ground state. © 1990 The American Physical Society.
Peter J. Price
Surface Science
A. Reisman, M. Berkenblit, et al.
JES
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989
F.J. Himpsel, T.A. Jung, et al.
Surface Review and Letters