Heat capacity of URu2−xOsxSi2 at low temperatures
Heat capacity of URu2−xOsxSi2 at low temperatures
复制标题
URu2·xOsxSi2 的低温热容
DOI：
10.1103/physrevb.105.l041106
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发表时间：
2022
影响因子：
3.7
通讯作者：
Dzero, M.
中科院分区：
文献类型：
--
作者：
Kunwar, D. L.;Panday, S. R.;Deng, Y.;Ran, S.;Baumbach, R. E.;Maple, M. B.;Almasan, Carmen C.;Dzero, M.
我们测量合金的热容作为温度的函数。实验结果表明，随着O3浓度的增加，二阶相变的临界温度升高，有序态的Sommerfeld系数值减小。我们还观察到临界温度下的热容增大，并且临界涨落区域也随着增加而变宽。我们利用Haule-Kotliar模型对实验数据进行了分析，该模型特别将母体材料中的“隐藏有序”转变识别为向具有非零十六极矩的状态的转变。我们证明了我们的实验结果与该模型的预测是一致的。
We perform measurements of the heat capacity as a function of temperature onalloys. Our experimental results show that the critical temperature of the second-order phase transition increases while the value of the Sommerfeld coefficient in the ordered state decreases with an increase in osmium concentration. We also observe an increase in the values of the heat capacity at the critical temperature as well as a broadening of the critical fluctuation region with an increase in. We analyze the experimental data using the Haule-Kotliar model which, in particular, identifies the “hidden order” transition in the parent materialas a transition to a state with a nonzero hexadecapole moment. We demonstrate that our experimental results are consistent with the predictions of that model.