无序对准一维矢势束缚中无质量Dirac电子的影响

The effects of disorder on massless Dirac electron in a one-dimensional vector confinement

通过有限差分的方法,数值计算了一个相对论性质的Dirac电子在磁场和无序同时存在时的能谱结构,并讨论了不同磁场强度和无序强度时电子密度分布的变化情况.结果发现:随着无序强度的增大,无序势削弱了磁场对电子的捕获,使局域化现象减弱,使得无质量Dirac电子出现了有别于Anderson局域化的现象.

It was numerically calculated the structure of energy spectrum and the electron density distribution of a Dirac electron in the present of a magnetic field and disorder by using the method of the finite difference. The effect of the different magnetic fields and disorder on the electron density distributions were also discussed. With the increase of disorder strength, disorder gradually weakensed the localization of the electron and made the massless Dirac electron delocalized which was different from the Anderson localization theory.