Microwave Conductivity Resonance of Two-Dimensional Hole System
Microwave Conductivity Resonance of Two-Dimensional Hole System
复制标题
二维空穴系统的微波电导共振
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
M. Shayegan
中科院分区：
文献类型：
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作者：
C. C. Li;L. Engel;D. Shahar;D. Tsui;M. Shayegan
我们测量了高品质二维孔系统 (2DHS) 在高磁场 (B) 绝缘相中的微波电导率 Ressxxd，频率 (f) 介于 0.2 和 9 GHz 之间。对于 n , 0.3，Ressxxd 与 f 在频率 fpk 处显示出明确的峰值。随着 B 的增加，最大 Ressxxd 也会增加。谐振 Q（fpk 除以半高全线宽）随 B 线性增加。fpk 与 B 增加，但对于 B $ 10 T，在 1.25 GHz 时几乎持平。通过积分频谱测量的振荡器强度 S 对于 B $ 10 T 来说同样是平坦的。同时与 B 无关的 S 和 fpk 与将谐振解释为维格纳晶体钉扎模式的传统 (Fukuyama-Lee) 不一致。 [S0031-9007(97)03876-3]
We have measured microwave conductivity, Ressxxd, of a high quality two-dimensional hole system (2DHS) in the high magnetic field (B) insulating phase for frequency ( f) between 0.2 and 9 GHz. For n , 0.3, Ressxxd vs f shows a well-defined peak at frequency fpk. As B is increased, the maximal Ressxxd increases. The resonance Q (fpk divided by full line width at half maximum) increases linearly with B. fpk vs B increases, but is nearly flat, at 1.25 GHz, for B $ 10 T. Oscillator strength, S, measured by integrating the spectrum, is likewise flat for B $ 10 T. The simultaneously B-independent S and fpk are inconsistent with the conventional (Fukuyama-Lee) interpretation of the resonance as a Wigner crystal pinning mode. [S0031-9007(97)03876-3]