采用无质量的Dirac方程，引入无穷大强制边界条件，讨论了石墨烯闭环中的Aharonov-Bohm效应。
We adopt the massless Dirac equation , combined by the infinite mass boundary condition , to investigate the Aharonov-Bohm effect in a closed graphene ring driven by magnetic flux .
闭环效应