| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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A Calorimetric Study Assisted with First Principle Calculations of Specific Heat for Si-Ge Alloys within a Broad Temperature Range |
| Qing Wang, Hai-Peng Wang**, De-Lu Geng, Ming-Xing Li, Bing-Bo Wei |
Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072
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| Cite this article: |
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Qing Wang, Hai-Peng Wang, De-Lu Geng et al 2018 Chin. Phys. Lett. 35 126501 |
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Abstract Calorimetric measurements are performed to determine the specific heat of Si-$x$ at.% Ge (where $x=0$, 10, 30, 50, 70, 90 and 100) alloys within a broad temperature range from 123 to 823 K. The measured specific heat increases dramatically at low temperatures, and the composition dependence of specific heat is evaluated from the experimental results. Meanwhile, the specific heat at constant volume, the thermal expansion, and the bulk modulus of Si and Ge are investigated by the first principle calculations combined with the quasiharmonic approximation. The negative thermal expansion is observed for both Si and Ge. Furthermore, the isobaric specific heat of Si and Ge is calculated correspondingly from 0 K to their melting points, which is verified by the measured results and accounts for the temperature dependence in a still boarder range.
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Received: 19 September 2018
Published: 23 November 2018
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| PACS: |
65.40.Ba
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(Heat capacity)
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65.40.De
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(Thermal expansion; thermomechanical effects)
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63.20.dk
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(First-principles theory)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 51522102, 51734008, 51327901 and 51474175. |
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| [1] | Lu B, Cheng X M, Feng J L, Guan X W and Miao X S 2016 Appl. Phys. Lett. 109 023506 | | [2] | Guo R Q, Wang X J, Kuang Y D and Huang B L 2015 Phys. Rev. B 92 115202 | | [3] | Polman A, Knight M, Garnett E C, Ehrler B and Sinke W C 2016 Science 352 add4424 | | [4] | Xiong S Y, Sääskilahti K, Kosevich Y A, Han H X, Donadio D and Volz S 2016 Phys. Rev. Lett. 117 025503 | | [5] | Fan C C, Liu J S, Zhang K L, Liu W L, Lu X L, Liu Z T, Wu D, Liu Z H, Shen D W and You L X 2018 Chin. Phys. Lett. 35 077104 | | [6] | Williams L and Kioupakis E 2017 Appl. Phys. Lett. 111 211107 | | [7] | Li M X, Wang H P, Yan N and Wei B B 2018 Sci. Chin. Technol. Sci. 61 1021 | | [8] | Yu X G and Choi K Y 2017 Appl. Therm. Eng. 126 237 | | [9] | Goto M, Xu Y B, Zhan T Z, Sasaki M, Nishimura C, Kinoshita Y and Ishikiriyama M 2018 Appl. Phys. Express 11 045202 | | [10] | Bin X, Xu J P, Liu L and Su Y 2018 Chin. Phys. Lett. 35 077302 | | [11] | Rawal S 2018 Acta Astronaut. 146 151 | | [12] | Foltyn S R, Civale L, Macmanus-Driscoll J L, Jia Q X, Maiorov B, Wang H and Maley M 2007 Nat. Mater. 6 631 | | [13] | Weinreich S J 2018 Rethinking History 22 270 | | [14] | Gurel T amd Eryigit R 2010 Phys. Rev. B 82 104302 | | [15] | Wang R, Wang S F, Wu X Z, Lan M J and Song T T 2012 Phys. Scr. 85 035705 | | [16] | Wang Y, Hu Y J, Firdosy S A, Star K E, Fleurial J P, Ravi V A, Chen L Q, Shang S L and Liu Z K 2018 J. Appl. Phys. 123 045102 | | [17] | Togo A, Oba F and Tanaka I 2008 Phys. Rev. B 77 184101 | | [18] | Togo A, Chaput L, Tanaka I and Hug G 2010 Phys. Rev. B 81 174301 | | [19] | Perdew J P, Burke K and Ernzerhof M 1996 Phys. Rev. Lett. 77 3865 | | [20] | Blochl P E 1994 Phys. Rev. B 50 17953 | | [21] | Phragmen G 1950 J. Inst. Met. 77 489 | | [22] | Cohen E R and Taylor B N 1987 Rev. Mod. Phys. 59 1121 | | [23] | Carr R H, McCammon R D and White G K 1965 Philos. Mag. 12 157 | | [24] | Argaman U, Eidelstein E, Levy O and Makov G 2016 Phys. Rev. B 94 174305 | | [25] | Slack G A and Bartram S F 1975 J. Appl. Phys. 46 89 | | [26] | Haynes W M, Lide D R and Bruno T J 2016 CRC Handbook of Chemistry and Physics (Boca Raton: CRC Press) pp 12–215 |
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