標題: From symmetry to entropy: Crystal entropy difference strongly affects early stage phase transformation
作者: Hu, C. H.
Chen, Y. C.
Yu, P. J.
Fung, K. Y.
Hsueh, Y. C.
Liaw, P. K.
Yeh, J. W.
Hu, A.
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 23-Dec-2019
摘要: Although the connection between symmetry and entropy is not clear, researchers calculate configurational entropy with an ideal gas mixing model all along regardless of which structure they are considering. However, it is obvious that crystalline structures have symmetry, while an ideal gas does not. Therefore, the same ideal gas mixing value should not be assigned to other structures, such as face-centered-cubic (fcc) and hexagonal-close-packed (hcp) structures. Here, we offer a precise definition for determining the configurational entropy of crystals. We calculate the difference in configurational entropy between fcc and hcp structures based on Burnside's lemma in combinatorial mathematics and crystallographic rotation-point groups.
URI: http://dx.doi.org/10.1063/1.5114974
http://hdl.handle.net/11536/153482
ISSN: 0003-6951
DOI: 10.1063/1.5114974
期刊: APPLIED PHYSICS LETTERS
Volume: 115
Issue: 26
起始頁: 0
結束頁: 0
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