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二维电子气中定向电子-电子散射诱导的绝对负电阻

Absolute negative resistance induced by directional electron-electron scattering in a two-dimensional electron gas.

作者信息

Kaya Ismet I, Eberl Karl

机构信息

SabanciUniversity, Faculty of Engineering and Natural Sciences, Tuzla, 34956 Istanbul, Turkey.

出版信息

Phys Rev Lett. 2007 May 4;98(18):186801. doi: 10.1103/PhysRevLett.98.186801. Epub 2007 Apr 30.

DOI:10.1103/PhysRevLett.98.186801
PMID:17501591
Abstract

A three-terminal device formed by two electrostatic barriers crossing an asymmetrically patterned two-dimensional electron gas displays an unusual potential depression at the middle contact, yielding absolute negative resistance. The device displays momentum and current transfer ratios that far exceed unity. The observed reversal of the current or potential in the middle terminal can be interpreted as the analog of Bernoulli's effect in a Fermi liquid. The results are explained by directional scattering of electrons in two dimensions.

摘要

由两个静电势垒穿过非对称图案化二维电子气形成的三端器件，在中间接触处呈现出异常的电势凹陷，产生绝对负电阻。该器件显示出远超1的动量和电流传输比。在中间端观察到的电流或电势反转可解释为费米液体中伯努利效应的类似物。结果通过二维电子的定向散射得到解释。

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