Experimental determination of phonon thermal conductivity and Lorenz ratio of single-crystal bismuth telluride
| Autor: | Mengliang Yao, Stephen D. Wilson, Cyril Opeil, Mona Zebarjadi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Range (particle radiation) Materials science Condensed matter physics Phonon thermal conductivity 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Measure (mathematics) Lattice thermal conductivity chemistry.chemical_compound Thermal conductivity chemistry Electrical resistivity and conductivity 0103 physical sciences General Materials Science Bismuth telluride 0210 nano-technology Single crystal |
| Zdroj: | MRS Communications. 7:922-927 |
| ISSN: | 2159-6867 2159-6859 |
| DOI: | 10.1557/mrc.2017.118 |
| Popis: | We use a magnetothermal resistance method to measure the lattice thermal conductivity of single-crystal Bi2Te3 from 5 to 60 K. Lattice thermal conductivity is calculated by extrapolating the thermal conductivity versus electrical conductivity curve to a zero electrical conductivity value. Our results show that the measured phonon thermal conductivity follows the e΄min/T temperature dependence and the Lorenz ratio corresponds to the modified Sommerfeld value in the intermediate temperature range. Our low-temperature experimental data and analysis on Bi2Te3 are a complement to previous measurements of Goldsmid (Ref. 17) and theoretical calculations by Hellman et al. (Ref. 18) at higher temperature 100-300 K. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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