论文标题
霍尔场诱导的磁振荡在石墨烯的电荷中立点附近
Hall field-induced magneto-oscillations near charge neutrality point in graphene
论文作者
论文摘要
我们使用大型直流电流与垂直磁场结合使用大石墨烯中的非平衡运输方式。在大部分石墨烯通道中产生的强大内部大厅场会导致空间上倾斜的Landau水平。整体中的回旋轨道的能量随指引导中心的空间位置的函数而变化，从而使我们能够观察到一系列引人注目的特征。虽然Shubnikov-de HAAS振荡可以预见在Hall场的存在下被抑制，但随着DC电流的函数，在电荷中立点附近出现了一组新的磁性振荡。当我们改变载体密度和直流电流时，具有线性分散剂的两个振荡分支是显而易见的，其速度与TA和LA声子模式非常相似，暗示了响声辅助的内部内部水平级别过渡，相邻的环形旋风之间。我们的结果为探索二维材料和范德华异质结构中的非平衡现象提供了独特的可能性。
We explore the non-equilibrium transport regime in graphene using a large dc current in combination with a perpendicular magnetic field. The strong in-plane Hall field that is generated in the bulk of the graphene channel results in Landau levels that are tilted spatially. The energy of cyclotron orbits in the bulk varies as a function of the spatial position of the guiding center, enabling us to observe a series of compelling features. While Shubnikov-de Haas oscillations are predictably suppressed in the presence of the Hall field, a set of fresh magnetoresistance oscillations emerge near the charge neutrality point as a function of dc current. Two branches of oscillations with linear dispersions are evident as we vary carrier density and dc current, the velocity of which closely resembles the TA and LA phonon modes, suggestive of phonon-assisted intra-Landau level transitions between adjacent cyclotron orbits. Our results offer unique possibilities to explore non-equilibrium phenomena in two-dimensional materials and van der Waals heterostructures.
