-
本文利用文献[9]的理论,讨论了强磁场下输运过程中的几个问题。文章首先指出在朗道表示中的输运过程要明显考虑边界条件问题.对横向电导,在正确处理边界条件后,不需要解玻耳茲曼型的输运方程,并在任意级的微扰下,证明Titeica图象是正确的。其次讨论了外电场ω≠0时的解,及其向经典过渡的问题,指出在同样的ωHτ>1,E0τ?1的条件下,量子解与经典解是不同的。最后,在附录中讨论了态密度积分引起的发散消除问题。指出在实际情况下,除了—ln(εc/kT)项外,(εc/kT)0项是同样重要的,它使量子极限下的ρT/ρL值得到与实验相符的结果。Using the theory developed in [9], certain questions of transport process in strong magnetic field are discussed. In the first place, we show that for this type of transport process one must consider the boundary condition explicitly. For transverse conductivity, it is not necessary to solve the kinetic equation of the Boltzmann type when the boundary condition is treated correctly, and Titeica's picture is shown to be correct in general order of perturbation expansion. Secondly, the solution of the case of external electric field's ω≠0 and its transition to the classical case are discussed. We show that under the same condition ωHτ>1, E0τ? 1, the quantum solution is different from that of the classical case. Finally, in an appendix, the question of eliminated divergence produced by the integral of state density is discussed. We indicate that in the realizable case a term of magnitude (εc/kT)° is as important as that of -ln (εc/kT). This correction makes the theoretical value of ρT/ρL consistent with the experimental data.
[1] -
[1]
计量
- 文章访问数: 7149
- PDF下载量: 444
- 被引次数: 0