Density-dependent instabilities in correlated two?dimensional electron systems
Density-dependent instabilities in correlated two?dimensional electron systems
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相关二维电子系统中密度相关的不稳定性
DOI：
10.1088/0953-8984/16/21/011
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
D. Ritchie
中科院分区：
文献类型：
--
作者：
A. Ghosh;M. Pepper;H. Beere;D. Ritchie
我们研究了介观低密度二维电子系统中的电输运随背景无序的变化。在零磁场下，在一个特定的窗口的无序和电子密度，一个不寻常的密度依赖性的振荡模式的电导观察到费米能量在本地化的制度。温度，源漏偏置和磁场依赖性的运输表明钉扎电子固体的形成，经历了一系列的有序无序转变的电子密度被改变的栅极。
We have investigated the electrical transport in mesoscopic low-density 2D electron systems as a function of background disorder. At zero magnetic field, over a specific window of disorder and electron density, an unusual density-dependent oscillatory pattern in conductance was observed as the Fermi energy was swept in the localized regime. The temperature, source-drain bias and magnetic field dependence of transport indicate the formation of a pinned electron solid, which undergoes a series of order-disorder transitions as the electron density is changed by a gate.