A model incorporating(Cs-A-ABAB)stacking with Cs atoms chemisorbed in hollow sites 2.70A above the top graphite plane and the two top graphite layers shear-shifted to AA stacking and expanded to a separation of 3.85A ...A model incorporating(Cs-A-ABAB)stacking with Cs atoms chemisorbed in hollow sites 2.70A above the top graphite plane and the two top graphite layers shear-shifted to AA stacking and expanded to a separation of 3.85A is the most reliable structure for Cs/graphite(0001)-(√3×√3)surfaces.The coexisting diffraction pattern including the diffraction ring and another set of (√3×√3) diffraction pattern which has a 30°rotation angle with respect to the normal(√3×√3)R3O°diffraction pattern could be explained.We consider this strueture to be in a prein ter cal ation state.展开更多
A simple 12-4-3 exp potential model is proposed to describe the interaction between adatoms.Two dimensional phase transition is studied by Monte Carlo simulation with lattice gas model in which the third nearest neigh...A simple 12-4-3 exp potential model is proposed to describe the interaction between adatoms.Two dimensional phase transition is studied by Monte Carlo simulation with lattice gas model in which the third nearest neighbor interaction is considered.Both the(√3×√3)-30°and the(2×2)structure are obtained under different coverages and temperatures.A limited T-0 phase dla-greun which is similar to that from experiment is Obtained.展开更多
基金Project suported by the National Natural Science Foundation of China.
文摘A model incorporating(Cs-A-ABAB)stacking with Cs atoms chemisorbed in hollow sites 2.70A above the top graphite plane and the two top graphite layers shear-shifted to AA stacking and expanded to a separation of 3.85A is the most reliable structure for Cs/graphite(0001)-(√3×√3)surfaces.The coexisting diffraction pattern including the diffraction ring and another set of (√3×√3) diffraction pattern which has a 30°rotation angle with respect to the normal(√3×√3)R3O°diffraction pattern could be explained.We consider this strueture to be in a prein ter cal ation state.
基金Supported by National Science Foundation of China.
文摘A simple 12-4-3 exp potential model is proposed to describe the interaction between adatoms.Two dimensional phase transition is studied by Monte Carlo simulation with lattice gas model in which the third nearest neighbor interaction is considered.Both the(√3×√3)-30°and the(2×2)structure are obtained under different coverages and temperatures.A limited T-0 phase dla-greun which is similar to that from experiment is Obtained.
