INFLUENCE OF GEOMETRY ON THE HALL-EFFECT IN BALLISTIC WIRES
INFLUENCE OF GEOMETRY ON THE HALL-EFFECT IN BALLISTIC WIRES
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DOI：
10.1103/physrevlett.62.2724
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发表时间：
1989-06-05
影响因子：
8.6
通讯作者：
HONG, JM
中科院分区：
文献类型：
--
作者：
FORD, CJB;WASHBURN, S;HONG, JM
我们提出了一个系统的研究交叉几何对窄弹道导线霍尔效应的影响。实验结果表明，在接近零磁场的情况下，霍尔电阻可以被淬灭、增强，甚至为负。在所有装置中都可以看到一个“最后平台”，证明其原因与淬火并不密切相关。一幅简单的物理图展示了这些效应是如何从这种几何形状的电子散射中产生的。
We present a systematic investigation of the influence of cross geometry on the Hall effect in narrow ballistic wires. Various differently shaped cross regions have been fabricated, which demonstrate that near zero magnetic field the Hall resistance can be quenched, enhanced over its classical value, or even negative. A ‘‘last plateau’’is seen in all devices, proving that its cause is not intimately linked to the quenching. A simple physical picture is presented showing how these effects come about from the scattering of electrons in such geometries.