{"title":"Hydrostatic pressure effect on lattice thermal conductivity of wurtzite GaN semiconductor","authors":"Diman M Abdullah, M S Omar","doi":"10.1007/s12034-024-03162-y","DOIUrl":null,"url":null,"abstract":"<div><p>Debye–Callaway model in combination with the Murnaghan and Clapeyron equations was used to calculate the hydrostatic pressure effects on lattice thermal conductivity (LTC) of wurtzite gallium nitride. The calculations are for the longitudinal and transverse phonon modes. The results are efficiently fitted with the whole temperature (1–400) of the experimental data. The peak value of LTC declines with the applied pressure from 0 to 14 GPa. This result is due to the decreasing Debye temperature, group velocity and lattice volume. Furthermore, pressure affected the number of dislocations, sample size and Gruneisen parameter (longitudinal and transverse) modes. Consequently, the values of above parameters at zero GPa are <span>\\(2.5\\times {10}^{13 }{{\\text{m}}}^{-2}, 1.8 {\\text{mm}}\\)</span>, <span>\\(0.93 \\,{\\text{and}}\\, 0.52\\)</span>, whilst the values at 14 GPa are <span>\\(15\\times {10}^{15}{\\mathrm{ m}}^{-2}, 1.68 {\\text{mm}},\\)</span> <span>\\(0.818 \\,{\\text{and}}\\, 0.469\\)</span>, respectively. The results show that hydrostatic pressure does not affect the number of impurities and electron concentrations.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Materials Science","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s12034-024-03162-y","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Debye–Callaway model in combination with the Murnaghan and Clapeyron equations was used to calculate the hydrostatic pressure effects on lattice thermal conductivity (LTC) of wurtzite gallium nitride. The calculations are for the longitudinal and transverse phonon modes. The results are efficiently fitted with the whole temperature (1–400) of the experimental data. The peak value of LTC declines with the applied pressure from 0 to 14 GPa. This result is due to the decreasing Debye temperature, group velocity and lattice volume. Furthermore, pressure affected the number of dislocations, sample size and Gruneisen parameter (longitudinal and transverse) modes. Consequently, the values of above parameters at zero GPa are \(2.5\times {10}^{13 }{{\text{m}}}^{-2}, 1.8 {\text{mm}}\), \(0.93 \,{\text{and}}\, 0.52\), whilst the values at 14 GPa are \(15\times {10}^{15}{\mathrm{ m}}^{-2}, 1.68 {\text{mm}},\)\(0.818 \,{\text{and}}\, 0.469\), respectively. The results show that hydrostatic pressure does not affect the number of impurities and electron concentrations.
期刊介绍:
The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.