{"title":"局域化-非局域化转变对 Bi2Te2Se 拓扑绝缘体热电性能的影响","authors":"L. Craco, S. Leoni","doi":"10.1063/5.0173308","DOIUrl":null,"url":null,"abstract":"The thermal transport properties of Bi2Te2Se topological insulators show a range of complex features. Large bulk resistivities coexisting with prominent Shubnikov–de Haas quantum oscillations and proximity to metallic states mark this p-band system as an unconventional topological quantum material. Here, using the density functional plus dynamical mean-field theory method, we show how localization–delocalization transition underpins the T-dependence of thermoelectric responses from room down to low temperatures. We present the implications of our many-particle analysis to resistivity, Seebeck coefficient, thermal conductivity, and Lorenz number and propose that related broadband systems close to electronic transitions could be of use in thermoelectrics.","PeriodicalId":486383,"journal":{"name":"APL Energy","volume":"2 3","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of localization–delocalization transition on thermoelectric properties of Bi2Te2Se topological insulator\",\"authors\":\"L. Craco, S. Leoni\",\"doi\":\"10.1063/5.0173308\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The thermal transport properties of Bi2Te2Se topological insulators show a range of complex features. Large bulk resistivities coexisting with prominent Shubnikov–de Haas quantum oscillations and proximity to metallic states mark this p-band system as an unconventional topological quantum material. Here, using the density functional plus dynamical mean-field theory method, we show how localization–delocalization transition underpins the T-dependence of thermoelectric responses from room down to low temperatures. We present the implications of our many-particle analysis to resistivity, Seebeck coefficient, thermal conductivity, and Lorenz number and propose that related broadband systems close to electronic transitions could be of use in thermoelectrics.\",\"PeriodicalId\":486383,\"journal\":{\"name\":\"APL Energy\",\"volume\":\"2 3\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-01-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"APL Energy\",\"FirstCategoryId\":\"0\",\"ListUrlMain\":\"https://doi.org/10.1063/5.0173308\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"APL Energy","FirstCategoryId":"0","ListUrlMain":"https://doi.org/10.1063/5.0173308","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
Bi2Te2Se 拓扑绝缘体的热传输特性显示出一系列复杂的特征。大体电阻率与突出的舒布尼科夫-德-哈斯量子振荡并存,以及与金属态的接近,标志着这种 p 带系统是一种非常规的拓扑量子材料。在这里,我们利用密度泛函加动态均场理论方法,展示了局域化-非局域化转变如何支撑了从室温到低温的热电响应的 T 依赖性。我们介绍了我们的多粒子分析对电阻率、塞贝克系数、热导率和洛伦兹数的影响,并提出接近电子跃迁的相关宽带系统在热电领域可能会有用武之地。
Effect of localization–delocalization transition on thermoelectric properties of Bi2Te2Se topological insulator
The thermal transport properties of Bi2Te2Se topological insulators show a range of complex features. Large bulk resistivities coexisting with prominent Shubnikov–de Haas quantum oscillations and proximity to metallic states mark this p-band system as an unconventional topological quantum material. Here, using the density functional plus dynamical mean-field theory method, we show how localization–delocalization transition underpins the T-dependence of thermoelectric responses from room down to low temperatures. We present the implications of our many-particle analysis to resistivity, Seebeck coefficient, thermal conductivity, and Lorenz number and propose that related broadband systems close to electronic transitions could be of use in thermoelectrics.