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首页> 外文期刊>Physica, C. Superconductivity and its applications >An extended pair tunneling model: studies on bilayer splitting and some superconducting state properties
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An extended pair tunneling model: studies on bilayer splitting and some superconducting state properties

机译：扩展对隧穿模型：双层分裂和一些超导状态性质的研究

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We consider an extended version of the pair tunneling model, including interlayer single particle hopping (ISPH) as a complementary process to pair tunneling. The normal state gap, as found in cuprates, is taken to suppress the effective ISPH in conformity with the experimental observations, and this in turn enhances the pair tunneling process. The effective ISPH involves a probability factor P, for which we consider two choices and provide phenomenological arguments in favour of them. We address the issue of bilayer splitting by calculating the spectral density function and corresponding photoemission intensity curves and show that our calculations conform with the absence of bilayer splitting observed in ARPES experiments on Bi2212. We have also studied the temperature variation of the superconducting gap and ratio of the superconducting gap to T-c. Our results, obtained for both the choices of P, are reasonably in good agreement with those from experiments on cuprate superconductors. A linear T-dependent choice of P, however, yields a precise match to the experimental data of the temperature varying superconducting gap. (C) 1998 Published by Elsevier Science B.V. All rights reserved. [References: 24]
机译：我们考虑对隧道模型的扩展版本，其中包括层间单粒子跳跃（ISPH）作为对隧道的补充过程。根据实验观察，以铜酸盐中的正常态间隙来抑制有效ISPH，这反过来又增强了对隧穿过程。有效的ISPH涉及概率因子P，对此我们考虑了两种选择，并提供了支持它们的现象学论据。我们通过计算光谱密度函数和相应的光发射强度曲线来解决双层分裂的问题，并表明我们的计算与在Bi2212上的ARPES实验中观察到的双层分裂的缺失相符。我们还研究了超导间隙的温度变化以及超导间隙与T-c的比率。我们从P的两个选择中获得的结果与铜酸盐超导体实验的结果合理地吻合。但是，线性依赖于T的P的选择与温度变化的超导间隙的实验数据精确匹配。 （C）1998，Elsevier Science B.V.保留所有权利。 [参考：24]

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