论文标题
由于Landau级过渡，双层石墨烯中的边缘光电流
Edge photocurrent in bilayer graphene due to inter-Landau-level transitions
论文作者
论文摘要
我们报告了经受Terahertz辐射和磁场的双层石墨烯中边缘光电流的共振激发的观察。对于兰道水平（LL）之间的带间（低载体密度）和带内（在高密度下）的频段（在高载体密度）（在高密度下），观察到了共振激发的边缘光电流。虽然频段内LL转变可以追溯到经典的回旋共振（CR）并产生强烈的谐振特征，但带间ll的共振具有量子性质，并导致测得的光电流光谱中的较弱特征。观察到的特征的幅度和极化特性与频带内边缘光藻类效应的半经典理论一致，包括其在低温下的Shubnikov-de-HaaS振荡。
We report the observation of the resonant excitation of edge photocurrents in bilayer graphene subjected to terahertz radiation and a magnetic field. The resonantly excited edge photocurrent is observed for both inter-band (at low carrier densities) and intra-band (at high densities) transitions between Landau levels (LL). While the intra-band LL transitions can be traced to the classical cyclotron resonance (CR) and produce strong resonant features, the inter-band-LL resonances have quantum nature and lead to the weaker features in the measured photocurrent spectra. The magnitude and polarization properties of the observed features agree with the semiclassical theory of the intra-band edge photogalvanic effect, including its Shubnikov-de-Haas oscillations at low temperatures.
