Dipolar order controls dielectric response of glass-forming liquids
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Acceso en línea: | |
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| _version_ | 1866929324127420416 |
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| author | Böhmer, Till Pabst, Florian Gabriel, Jan P. Blochowicz, Thomas |
| author_facet | Böhmer, Till Pabst, Florian Gabriel, Jan P. Blochowicz, Thomas |
| contents | 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 $β$ should be correlated with the degree of dipolar order, i.e., the Kirkwood correlation factor $g_K$. 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_14277 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dipolar order controls dielectric response of glass-forming liquids Böhmer, Till Pabst, Florian Gabriel, Jan P. Blochowicz, Thomas Soft Condensed Matter Disordered Systems and Neural Networks 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 $β$ should be correlated with the degree of dipolar order, i.e., the Kirkwood correlation factor $g_K$. 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. |
| title | Dipolar order controls dielectric response of glass-forming liquids |
| topic | Soft Condensed Matter Disordered Systems and Neural Networks |
| url | https://arxiv.org/abs/2404.14277 |