Laboratoire de Physique Theorique et Modelisation, Universite de Cergy-Pontoise-CNRS, F-95302 Cergy-Pontoise Cedex, France.
Nano Lett. 2010 Mar 10;10(3):804-8. doi: 10.1021/nl902948m.
For Dirac electrons the Klein paradox implies that the confinement is difficult to achieve with an electrostatic potential although it can be of great importance for graphene-based devices. Here, ab initio and tight-binding approaches are combined and show that the wave function of Dirac electrons can be localized in rotated graphene bilayers due to the Moire pattern. This localization of wave function is maximum in the limit of the small rotation angle between the two layers.
对于狄拉克电子，克莱因佯谬意味着尽管静电势对于基于石墨烯的器件非常重要，但它很难实现对狄拉克电子的限制。在这里，我们结合了第一性原理和紧束缚方法，表明由于莫尔图案，狄拉克电子的波函数可以在旋转的双层石墨烯中局域化。在两层之间的小旋转角度极限下，波函数的局域化达到最大值。
