Two-gap superconductivity in MgB2
Two-gap superconductivity in MgB2
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DOI：
10.1142/s0217979203018557
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发表时间：
2003-05
影响因子：
1.7
通讯作者：
Angsula Ghosh
中科院分区：
文献类型：
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作者：
Angsula Ghosh
本文采用紧束缚模型研究了MgB_2的超导电性，讨论了序参量和临界温度与掺杂的关系。我们考虑了各向异性和各向同性的s波配对来研究这两个间隙的共存。现有的实验和我们的理论曲线之间的一个很好的协议进行观察。序参量、比热和半填充穿透深度的温度依赖性也被证明，并发现与现有的实验预测雅阁。
We study the superconductivity in MgB2 using a tight binding model to investigate the doping dependence of the order parameter and the critical temperature. We consider both the anisotropic and the isotropic s-wave pairing to study the coexistence of the two gaps. A good agreement between the existing experiments and our theoretical curves is observed. The temperature dependence of order parameter, specific heat and penetration depth at half filling are also demonstrated and are found to be in accord with the available experimental predictions.