【摘要】 本文从量子力学的基本概念出发,在对称规范变换下,借助特殊函数方程理论,研究了不均匀磁场和垂直电场联合作用下AA堆积双层石墨的朗道能级结构.结果表明该体系中的朗道能级是高度简并的,特别是在狄拉克点处,而且该体系中偶然简并的零能朗道能级能够被垂直电场有效地调控.更多还原

【Abstract】 Based on the elementary concepts of quantum mechanics,the combined effects of a nonuniform magnetic field and a vertical electric field on the Landau levels in AA- stacked bilayer graphite are investigated within the symmetric gauge by means of special function theory. The results show that the Landau levels in this system are high degenerate quantization,especially at the Dirac points. Furthermore,the accidental degeneracy of zero- energy states can be effectively modulated by the interlayer bias voltage.更多还原