2 papers
cond-mat.str-el1998
Theory of Excitons in Insulating Cu-Oxide Plane
Fu Chun Zhang, Kwai-Kong Ng
We use a local model to study the formation and the structure of the low energy charge transfer excitations in the insulating Cu-O plane. The elementary excitation is a bound e…
cond-mat1995
Phase Transitions of the Bilayered Spin-S Heisenberg Model and Its Extension to Fractional Dimensions
Kwai-Kong Ng, Fu Chun Zhang, Michael Ma
We study the ground state and the phase transitions of the bilayered spin- antiferromagnetic Heisenberg model using the Schwinger boson mean field theory. The interplane couplin…