CONDUCTION THRESHOLD AND PINNING FREQUENCY OF MAGNETICALLY INDUCED WIGNER SOLID
CONDUCTION THRESHOLD AND PINNING FREQUENCY OF MAGNETICALLY INDUCED WIGNER SOLID
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DOI：
10.1103/physrevlett.66.3285
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发表时间：
1991-06-24
影响因子：
8.6
通讯作者：
HARRIS, JJ
中科院分区：
文献类型：
--
作者：
WILLIAMS, FIB;WRIGHT, PA;HARRIS, JJ
结果表明，低温强磁场下的GaAlAs/GaAlAs异质结二维电子量子系统表现出典型的钉扎电荷密度波的导电特性。欧姆传导的交叉发生在射频共振发出横向弹性开始信号的同一边界上。另一个较小的非欧姆区通过nu=1/5的量子霍尔效应相与主区隔开。用钉扎电子晶体模型很好地解释了阈值导电场与共振频率之间的关系。
The 2D quantum system of electrons at a GaAs/GaAlAs heterojunction in high magnetic field at low temperature is shown to exhibit conduction typical of pinned charge-density waves. Crossover from Ohmic conduction occurs on the same boundary at which radio-frequency resonances signal the onset of transverse elasticity. A further small non-Ohmic region is isolated from the main area by a nu = 1/5 quantum-Hall-effect phase. The relationship found between the threshold conduction field and the resonance frequency is well accounted for by a model of a pinned electron crystal.