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RESISTANCE SPIKES INDUCED BY GATE-CONTROLLED VALLEY-SPLITTING IN SILICON

机译:硅栅控谷崩引起的电阻峰值

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摘要

Landau-level coincidences are examined in a (100) silicon 2DEG by tuning the valley-splitting with front- and back-gates. A coincidence under quantum Hall conditions between levels of opposite spin, opposite valley, but like orbital indices at ν = 6 is found to show suppressed resistance, while in marked contrast, coincidences at ν = 4i (where i is an integer) between adjacent orbital Landau levels exhibit resistance spikes.
机译:在(100)硅2DEG中,通过调整带有前门和后门的波谷分割,可以检查Landau级别的重合。在量子霍尔条件下,自旋,相反谷的水平之间的重合,但在ν= 6处的轨道指数相似时,显示出抑制的阻力,而在明显的对比中,在相邻轨道之间的ν= 4i(其中i是整数)时的重合朗道水平表现出阻力峰值。

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