{"title":"铅单氢晶体的温度相关结构相变","authors":"A. Rawat, A. Rawat, T. C. Upadhyay","doi":"10.4038/SLJP.V17I0.8028","DOIUrl":null,"url":null,"abstract":"With the use of the modified pseudospin lattice coupled-mode (PLCM) model by adding third-order and fourth-order phonon anharmonic interactions terms and the statistical Green’s function technique a phenomenological explanation of phase transition of the lead monohydrogen arsenate (PbHAsO 4 ) crystal has been given. Expressions for shift, width, dielectric constant, loss tangent and modified ferroelectric soft mode frequency have been derived theoretically. By fitting model values of various quantities obtained from literature in these derived expressions, their temperature dependence has been evaluated numerically. Present theoretically results agree well with the experimental results of others.","PeriodicalId":21880,"journal":{"name":"Sri Lankan Journal of Physics","volume":"29 1","pages":"19"},"PeriodicalIF":0.0000,"publicationDate":"2017-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Temperature dependent structural Phase transition in Lead Mono Hydrogen Aresenate crystal\",\"authors\":\"A. Rawat, A. Rawat, T. C. Upadhyay\",\"doi\":\"10.4038/SLJP.V17I0.8028\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"With the use of the modified pseudospin lattice coupled-mode (PLCM) model by adding third-order and fourth-order phonon anharmonic interactions terms and the statistical Green’s function technique a phenomenological explanation of phase transition of the lead monohydrogen arsenate (PbHAsO 4 ) crystal has been given. Expressions for shift, width, dielectric constant, loss tangent and modified ferroelectric soft mode frequency have been derived theoretically. By fitting model values of various quantities obtained from literature in these derived expressions, their temperature dependence has been evaluated numerically. Present theoretically results agree well with the experimental results of others.\",\"PeriodicalId\":21880,\"journal\":{\"name\":\"Sri Lankan Journal of Physics\",\"volume\":\"29 1\",\"pages\":\"19\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-01-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Sri Lankan Journal of Physics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4038/SLJP.V17I0.8028\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sri Lankan Journal of Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4038/SLJP.V17I0.8028","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Temperature dependent structural Phase transition in Lead Mono Hydrogen Aresenate crystal
With the use of the modified pseudospin lattice coupled-mode (PLCM) model by adding third-order and fourth-order phonon anharmonic interactions terms and the statistical Green’s function technique a phenomenological explanation of phase transition of the lead monohydrogen arsenate (PbHAsO 4 ) crystal has been given. Expressions for shift, width, dielectric constant, loss tangent and modified ferroelectric soft mode frequency have been derived theoretically. By fitting model values of various quantities obtained from literature in these derived expressions, their temperature dependence has been evaluated numerically. Present theoretically results agree well with the experimental results of others.
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