铝单层薄膜中的激子增强超导性
Exciton-Enhanced Superconductivity in Monolayer Films of Aluminum
AI总结：
本文提出激子机制解释铝单层薄膜中超导临界温度增强的现象，指出激子诱导库珀配对可产生更大能隙和更高临界温度，并通过与实验对比验证了该可能性。
摘要：
BCS理论在描述常规超导性方面取得了广泛成功。然而，当长度尺度达到原子极限时，降维可能导致量子击穿，从而产生不可预测的超导行为。实验已经证明，在FeSe/STO和外延铝的单层薄膜中，临界温度显著增强。在此，我们提出超导的激子机制，作为混合超导体-半导体结构中超导增强的可能原因。与声子诱导的超导性相比，激子诱导的库珀配对可能导致更大的能隙和更高的临界温度。将理论与参考文献1的实验结果进行详细比较，揭示了在接近单层极限的铝薄膜中可能存在激子诱导的超导性。
英文摘要：
The BCS theory has achieved widespread success in describing conventional superconductivity. However, when the length scale reaches the atomic limit, the reduced dimensionality may lead to the quantum breakdown resulting in unpredictable superconducting behaviors. It has been exper imentally evidenced that the critical temperature is strongly enhanced in the monolayer films of FeSe/STO and epitaxial Aluminum. Here, we propose the exciton mechanism of superconductivity as a possible reason for the enhanced superconductivity in hybrid superconductor-semiconductor structures. The exciton-induced Cooper pairing may lead to the larger energy gaps and higher critical temperatures as compared to those caused by the phonon induced superconductivity. A detailed comparison of the theory and experimental results of Ref. 1 reveals the possibility of exciton-induced superconductivity in thin films of Aluminum near the monolayer limit.
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