When the strengths of various couplings are changed, there will exist a critical point of the inter-site electron-electron Coulomb repulsion, and at this point, the system will experience a transformation from strong SDW state to strong SDW one.

• 在改变系统内有关耦合参数的情况下 ,均存在一个最近邻格点间的电子 -电子 Coulomb排斥相互作用的临界值 ,在该临界值处 ,系统将发生由强SDW态向强 CDW态的转变