论爱因斯坦固体模型中声子的化学势
收稿日期: 2019-09-01
修回日期: 2020-02-26
网络出版日期: 2020-10-16
基金资助
东南大学教学改革研究与实践项目(2019-074);教育部高等学校物理学类专业教学指导委员会项目;东南大学理科试验班本科教学综合改革项目资助
On chemical potential of phonons in Einstein solid model
Received date: 2019-09-01
Revised date: 2020-02-26
Online published: 2020-10-16
侯吉旋 . 论爱因斯坦固体模型中声子的化学势[J]. 大学物理, 2020 , 39(10) : 12 -13 . DOI: 10.16854 / j.cnki.10000712.190449
Thermodynamic quantities of the Einstein solid model are studied via the microcanonical approach.We point out that the number of phonos in Einstein solid model cannot be defined independently and thus the chemical potential of phonos cannot be defined in the microcanonical ensemble. The chemical potential of phonos can be calculated only if the number of phonons can fluctuate. And we prove that the chemical potential of phonos in Einstein solid model strictly equals to zero in other ensembles.
Key words： Einstein solid; phonon; chemical potential
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