L. E. Shelimova, P. Konstantinov, O. G. Karpinsky, E. S. Avilov, M. Kretova, J. Fleurial
{"title":"Complex ternary mixed layered tetradymite-like chalcogenides as novel thermoelectrics","authors":"L. E. Shelimova, P. Konstantinov, O. G. Karpinsky, E. S. Avilov, M. Kretova, J. Fleurial","doi":"10.1109/ICT.1999.843446","DOIUrl":null,"url":null,"abstract":"The nGeTe-mBi/sub 2/Te/sub 3/ and nGeTe-mSb/sub 2/Te/sub 3/ homologous series mixed layered (Mt.) compounds have been investigated by X-ray diffraction. A variety of the ML long-period structures is discovered in the GeTe-Bi/sub 2/Te/sub 3/ and GeTe-Sb/sub 2/Te/sub 3/ quasi-binary systems. Temperature dependencies of Hall coefficient, electrical resistivity and Seebeck coefficient have been measured in a wide temperature range. A mixed carrier scattering mechanism on acoustic phonons and point defects is proposed to explain the carrier mobility temperature dependence at low temperatures. It is found that the ML compounds are characterized by extremely low lattice thermal conductivity at 300 K: /spl kappa//sub ph/=5-7 mW/cm K.","PeriodicalId":253439,"journal":{"name":"Eighteenth International Conference on Thermoelectrics. Proceedings, ICT'99 (Cat. No.99TH8407)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1999-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Eighteenth International Conference on Thermoelectrics. Proceedings, ICT'99 (Cat. No.99TH8407)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICT.1999.843446","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
The nGeTe-mBi/sub 2/Te/sub 3/ and nGeTe-mSb/sub 2/Te/sub 3/ homologous series mixed layered (Mt.) compounds have been investigated by X-ray diffraction. A variety of the ML long-period structures is discovered in the GeTe-Bi/sub 2/Te/sub 3/ and GeTe-Sb/sub 2/Te/sub 3/ quasi-binary systems. Temperature dependencies of Hall coefficient, electrical resistivity and Seebeck coefficient have been measured in a wide temperature range. A mixed carrier scattering mechanism on acoustic phonons and point defects is proposed to explain the carrier mobility temperature dependence at low temperatures. It is found that the ML compounds are characterized by extremely low lattice thermal conductivity at 300 K: /spl kappa//sub ph/=5-7 mW/cm K.