Anharmonic entropy of alkali metals.
Anharmonic entropy of alkali metals.
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碱金属的非简谐熵。
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
Wallace
中科院分区：
文献类型：
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作者：
Wallace
从Na、K和Rb在熔化温度下的实验总熵中提取了非谐熵。非谐熵约占总熵的1%。当考虑到数据中的小的恒定误差时，这些金属的非谐熵位于一条曲线上；这条曲线与早期的计算机模拟的钠是定性一致的。目前的结果和计算机模拟表明，前序非简谐微扰理论是失败的。
The anharmonic entropy is extracted from the experimental total entropy at temperatures up to melting for Na, K, and Rb. The anharmonic entropy is {approx lt}1% of the total entropy. When allowance is made for small constant errors in the data, the anharmonic entropy of these metals lies on a single curve; this curve is in qualitative agreement with earlier computer simulations for Na. The present results and the computer simulations suggest the failure of leading-order anharmonic perturbation theory.