The dielectric response of liquids reflects both reorientation of single molecular dipoles and collective modes, i.e., dipolar cross-correlations. A recent theory predicts the latter to produce an additional slow peak in the dielectric loss spectrum. Following this idea we argue that in supercooled liquids the high-frequency power law exponent of the dielectric loss $\beta$ should be correlated with the degree of dipolar order, i.e., the Kirkwood correlation factor $g_{\mathrm{K}}$. This notion is confirmed for 25 supercooled liquids. While our findings support recent theoretical work the results are shown to violate the earlier Kivelson-Madden theory.

中文翻译：

---

偶极级控制玻璃形成液体的介电响应

液体的介电响应反映了单分子偶极子的重新定向和集体模式，即偶极互相关。最近的理论预测后者会在介电损耗谱中产生额外的慢峰。按照这个想法，我们认为在过冷液体中，介电损耗的高频幂律指数$\beta$应与偶极有序度​​相关，即柯克伍德相关因子$G_{\mathrm{K}}$。这个概念在 25 种过冷液体中得到了证实。虽然我们的研究结果支持最近的理论工作，但结果表明违反了早期的基维尔森-马登理论。