论文标题
无XTAMINES热力学应用于超导性
Nonextensive thermodynamics applied to superconductivity
论文作者
论文摘要
我们已经表明，弱耦合极限超导体由$ q \ sim 1 $很好地描述，其中$ q $是一个真正的参数，它表征了tsallis熵的无Xtentensentive的程度。然而，与实验结果相比，相对于Q = 1的小偏差提供了更好的一致性。我们还表明，具有$ q \ neq 1 $的广义BCS理论在低温方向上表现出几种可测量的宏观功能的幂律行为。这些幂律特性是在许多高-TC氧化物超导体中发现的，并促使我们将Tsallis的熵计算扩展到这些系统。因此，我们计算了相图和特定热量，并将结果与YBCO化合物的实验数据进行了比较。
We have shown that the weak-coupling limit superconductors are well described by $ q \sim 1 $, where $ q $ is a real parameter which characterizes the degree of nonextensivity of Tsallis' entropy. Nevertheless, small deviations with respect to q=1 provide better agreement when compared with experimental results. We have also shown that the generalized BCS theory with $ q \neq 1 $ exhibit power-law behavior of several measurable macroscopic functions in the low-temperature regime. These power-law properties are found in many high-Tc oxides superconductors and motivated us to extend Tsallis' entropy calculations to these systems. Therefore, we have calculated the phase diagram and the specific heat and we compare our results with the experimental data for the YBCO compound.
