The energy spectral analysis of the strong-coupled superlattice

We study the energy spectrum of the strong-coupled superlattice. The barrie rs affect the energy spectral statistics in a small scale. The nearest-neig hbor energy-level distribution P(s) and the spectral rigidity Delta(3)(L) d emonstrated the GOE (Gaussian Orthogonal Ensemble) distribution. In the who le scale, with the electric field increasing, the spectral rigidity Delta(3 )(L) changes from the Poisson-type like distribution to the Wigner-type lik e distribution due to the change of the energy-level long-correlation, whil e the P(s) indicates that the system demonstrates to be integrable. The nea r-degeneracy of levels makes the level statistics complex. (C) 1999 Publish ed by Elsevier Science B.V. All rights reserved.