Screened dielectric response of sliding charge-density waves.
Screened dielectric response of sliding charge-density waves.
复制标题
滑动电荷密度波的屏蔽介电响应。
DOI：
10.1103/physrevb.36.3108
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
Littlewood
中科院分区：
文献类型：
--
作者：
Littlewood
The linear response of a model of deformable charge-density waves pinned by weak disorder is calculated, including the screening effects of free carriers and using a simple model for the distribution of pinned modes. Owing to the screening of localized pinned collective oscillations, the dielectric function develops a low-frequency loss peak in addition to the expected absorption close to the pinning frequency. These results provide a quantitative explanation of the apparent discrepancies between low-frequency (≲ 10 MHz) electrical measurements and higher-frequency (microwave or infrared) measurements of the dielectric response. Implications for measurements of the nonlinear dc conductivity are discussed.
