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arXiv 0707.4348cond-mat.supr-concond-mat.str-el
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电子掺杂铜氧化物超导体的能隙函数对称性和自旋动力学

Gap function symmetry and spin dynamics in electron-doped cuprate superconductor

C. S. Liu, W. C. Wu

摘要:

针对电子掺杂铜氧化物超导体,提出了一个反铁磁自旋涨落诱导的配对模型。这表明,类似于空穴掺杂侧,超导能隙函数是单调的d_{x^2-y^2}波,并解释了为什么观察到的间隙函数具有非单调的d_{x^2-y^2}波行为时,考虑到AF顺序。动态自旋磁化率的计算结果与实验符合得很好。这为所提出的模型提供了有力的支持。

英文摘要:

An antiferromagnetic (AF) spin fluctuation induced pairing model is proposed for the electron-doped cuprate superconductors. It suggests that, similar to the hole-doped side, the superconducting gap function is monotonic d_{x^2-y^2}-wave and explains why the observed gap function has a nonmonotonic d_{x^2-y^2}-wave behavior when an AF order is taken into account. Dynamical spin susceptibility is calculated and shown to be in good agreement with the experiment. This gives a strong support to the proposed model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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