Evolutions of competition of multiple-spin-exchange interactions and structure in submonolayer solid He-3 film adsorbed on Grafoil - art. no. 185301

For He-3 submonolayer solid adsorbed on Grafoil, the evolutions of the adso rption structure and of the competition of multiple-spin-exchange interacti ons with increasing areal density are discussed. The discrepancy of the hea t-capacity exponent from the normal value, -2, is, considered to show the s trength of the competition. We give various discussions to explain the dens ity dependence of the competition, the sudden change of the exchange freque ncy, and other observations. There we propose the structural phase diagram constructed from the simulations and. the possible zero-point vacancies.