Microwave spectroscopic observation of a Wigner solid within the ν=1/2 fractional quantum Hall effect

被引：8
|
作者：
Hatke, A. T. [1 ,3 ]
Liu, Yang [2 ]
Engel, L. W. [1 ]
Pfeiffer, L. N. [2 ]
West, K. W. [2 ]
Baldwin, K. W. [2 ]
Shayegan, M. [2 ]
机构：
[1] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
[2] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA
[3] Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA
来源：
PHYSICAL REVIEW B | 2017年 / 95卷 / 04期
基金：
美国国家科学基金会;
关键词：
MAGNETIC-FIELDS; ELECTRON-SYSTEM; CONDUCTIVITY; CRYSTAL; STATE; CRYSTALLIZATION; LIQUID; WELLS;
D O I：
10.1103/PhysRevB.95.045417
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have studied the microwave spectra of a wide quantum well for Landau level fillings nu, just below 1/2, under conditions where the nu = 1/2 fractional quantum Hall effect (FQHE) is present. One resonance in the spectra exhibits intensity variations with. in striking agreement with that expected for a pinning mode of a Wigner solid of quasiholes of this FQHE state. This resonance is also quite sensitive to asymmetrization of the growth-direction charge distribution in the quantum well by gate bias. Another resonance in the spectra is associated with a different bilayer Wigner solid that also exists at much lower. than the 1/2 FQHE, and that appears to coexist with the 1/2 quasihole solid.
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页数：5
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