At last, the energy of the bubble formation frequency band was compared with the bubble model which shows the reliability of the analysis methods mentioned above.
For the on-site model, a four-subband global structure of energy spectrum is shown clearly, but no obvious hierarchical trifurcation of each sub-band is found.
对于在位模型，谱结构是清晰的四子带全局结构，但每一子带未见明显的三分支结构。
3
As conducting polymers belong to the system of wide energyband, the SSH model in a state of tight-binding approximation is too crude.