{"title":"无定形冰中的集体激发","authors":"R. M. Khusnutdinoff","doi":"10.1134/S1061933X24601410","DOIUrl":null,"url":null,"abstract":"<p>The paper presents the results of molecular dynamics simulating microscopic collective excitations in low-density amorphous ice, with the simulation being based on the monatomic ML-mW model of the intermolecular interaction potential. The calculated spectra of longitudinal <span>\\({{C}_{{\\text{L}}}}(k,\\omega )\\)</span> and transverse <span>\\({{C}_{{\\text{T}}}}(k,\\omega )\\)</span> current spectra have revealed the propagation of collective excitations of the longitudinal and transverse polarizations in amorphous ice within a wide range of wavenumbers. The region of mixing the longitudinal and transverse collective modes in low-density amorphous ice has been found. It has been shown that, in terms of the dispersion law of transverse acoustic-like modes, the temperature dependence of gap width <i>k</i><sub>gap</sub> is described by a linear dependence.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 2","pages":"229 - 235"},"PeriodicalIF":1.1000,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Collective Excitations in Amorphous Ice\",\"authors\":\"R. M. Khusnutdinoff\",\"doi\":\"10.1134/S1061933X24601410\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The paper presents the results of molecular dynamics simulating microscopic collective excitations in low-density amorphous ice, with the simulation being based on the monatomic ML-mW model of the intermolecular interaction potential. The calculated spectra of longitudinal <span>\\\\({{C}_{{\\\\text{L}}}}(k,\\\\omega )\\\\)</span> and transverse <span>\\\\({{C}_{{\\\\text{T}}}}(k,\\\\omega )\\\\)</span> current spectra have revealed the propagation of collective excitations of the longitudinal and transverse polarizations in amorphous ice within a wide range of wavenumbers. The region of mixing the longitudinal and transverse collective modes in low-density amorphous ice has been found. It has been shown that, in terms of the dispersion law of transverse acoustic-like modes, the temperature dependence of gap width <i>k</i><sub>gap</sub> is described by a linear dependence.</p>\",\"PeriodicalId\":521,\"journal\":{\"name\":\"Colloid Journal\",\"volume\":\"87 2\",\"pages\":\"229 - 235\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2025-04-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Colloid Journal\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S1061933X24601410\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Colloid Journal","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S1061933X24601410","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
The paper presents the results of molecular dynamics simulating microscopic collective excitations in low-density amorphous ice, with the simulation being based on the monatomic ML-mW model of the intermolecular interaction potential. The calculated spectra of longitudinal \({{C}_{{\text{L}}}}(k,\omega )\) and transverse \({{C}_{{\text{T}}}}(k,\omega )\) current spectra have revealed the propagation of collective excitations of the longitudinal and transverse polarizations in amorphous ice within a wide range of wavenumbers. The region of mixing the longitudinal and transverse collective modes in low-density amorphous ice has been found. It has been shown that, in terms of the dispersion law of transverse acoustic-like modes, the temperature dependence of gap width kgap is described by a linear dependence.
期刊介绍：
Colloid Journal (Kolloidnyi Zhurnal) is the only journal in Russia that publishes the results of research in the area of chemical science dealing with the disperse state of matter and surface phenomena in disperse systems. The journal covers experimental and theoretical works on a great variety of colloid and surface phenomena: the structure and properties of interfaces; adsorption phenomena and structure of adsorption layers of surfactants; capillary phenomena; wetting films; wetting and spreading; and detergency. The formation of colloid systems, their molecular-kinetic and optical properties, surface forces, interaction of colloidal particles, stabilization, and criteria of stability loss of different disperse systems (lyosols and aerosols, suspensions, emulsions, foams, and micellar systems) are also topics of the journal. Colloid Journal also includes the phenomena of electro- and diffusiophoresis, electro- and thermoosmosis, and capillary and reverse osmosis, i.e., phenomena dealing with the existence of diffusion layers of molecules and ions in the vicinity of the interface.
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