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首页> 外文会议>International Conference on High Magnetic Fields in Semiconductor Physics; 20040802-06; Tallahassee,FL(US) >DESTRUCTION OF CORRELATED BILAYER STATES SUBJECTED TO TILTED MAGNETIC FIELDS
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DESTRUCTION OF CORRELATED BILAYER STATES SUBJECTED TO TILTED MAGNETIC FIELDS

机译：倾斜磁场对相关双态的破坏

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摘要

We use tilted magnetic fields to effectively decouple a strongly coupled bilayer two-dimensional electron system into two separate layers. For our specific sample (tunnelling gap Δ_(SAS) = 2.5 meV) the inter-layer coupling is quenched by an in-plane field B ≈ 14 T, leading to the successive disappearance of all odd-integer states visible in the quantum Hall effect. Such a transition from a bilayer into two single layers is also observed in a solely parallel magnetic field. Surprisingly, the ν = 1 the quantum Hall state remains present even for in-plane fields exceeding 20 T. Only when decreasing the total Landau level filling slightly below ν = 1 the system undergoes an abrupt transition from a ν = 1 quantum Hall state into two (insulating) systems with a half filled Landau level.
机译：我们使用倾斜磁场有效地将强耦合双层二维电子系统解耦为两个单独的层。对于我们的特定样品（隧道间隙Δ_（SAS）= 2.5 meV），层间耦合被平面内场B≈14 T淬灭，导致量子霍尔效应中可见的所有奇整数状态连续消失。 。从双层到两个单层的这种转变也可以在完全平行的磁场中观察到。令人惊讶的是，即使平面内场超过20 T，ν= 1仍然存在量子霍尔态。只有当将填充的总Landau能级降低到略低于ν= 1时，系统才会经历从ν= 1量子霍尔态到跃迁的突然转变。两个（绝缘）系统，其半高水平的朗道水平。

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